Practice Test

Q1) Excess of nitrates in the field get mixed up with drinking water. It may result in: Show Answer

Q2) Radioactive pollution causes: Show Answer

Q3) Air pollution causes: Show Answer

Q4) Water pollution can be stopped best by: Show Answer

Q5) Organic waste products: Show Answer

Q6) Noise pollution causes: Show Answer

Q7) During combustion of fuels, gases released are: Show Answer

Q8) Environmental pollutant that can cause birth defects is: Show Answer

Q9) As a general rule, ionizing radiation is most damaging to: Show Answer

Q10) It is said that Taj may be destroyed due to: Show Answer

Q11) Which of the following is normally not an atmospheric pollutant? Show Answer

Q12) The presence of ozone in the atmosphere of earth: Show Answer

Q13) What will happen if our water resources are continued to be polluted by industrial wastes? Show Answer

Q14) In Bhopal gas tragedy, the gas released was: Show Answer

Q15) Aerosols are: Show Answer

Q16) The 'Love Canal Incidence' is concerned with: Show Answer

Q17) The "solution to pollution is dilution." This can be best correlated to: Show Answer

Q18) Which of the following pollutants is not produced by exhaust of motor vehicles? Show Answer

Q19) Minamata disease is a pollution related disease which results from: Show Answer

Q20) Most outstanding danger at present for the survival of living beings on the earth is: Show Answer

Q21) What does the term 'over kill' deal with? Show Answer

Q22) Radiation is health hazard because it causes: Show Answer

Q23) In which industry, workers suffer from Byssinosis? Show Answer

Q24) Spraying of DDT on crops produces pollution of: Show Answer

Q25) The most widely existing pollutant in the air is: Show Answer

Q26) If water pollution continues at its present rate, it will eventually: Show Answer

Q27) Which of the following air pollutants is the chief cause of acid rains? Show Answer

Q28) Which part of human body is first to be affected by nuclear radiations? Show Answer

Q29) Opuntia was a menace a few decades back in India. It was almost eradicated by: Show Answer

Q30) Photochemical smog is caused by formation of: Show Answer

Q31) Where did the epidemic bone softening disease 'Itai Itai' occurred first? Show Answer

Q32) Non-biodegradable toxic pollutants, as they pass through food webs, undergo biological: Show Answer

Q33) WHO's recommendations about the industrial noise limit is of: Show Answer

Q34) Contamination with radioactivity is dangerous because it causes: Show Answer

Q35) A pollutant is any substance, chemical or other factor, that changes: Show Answer

Q36) The molecular action of ultraviolet light is mainly reflected through: Show Answer

Q37) In big cities automobiles are responsible for air pollution: Show Answer

Q38) An important source of aerosol in upper atmosphere is: Show Answer

Q39) Enriched air, if inhaled for long time, causes: Show Answer

Q40) In a small town, pasture is contaminated with air borne fluorides, Grazing animals of that area will suffer from: Show Answer

Q41) Strengthening of concept of environmental monitoring is due to concern for the: Show Answer

Q42) Mudball technique has been proposed by: Show Answer

Q43) Biomagnification is a process of: Show Answer

Q44) Environmental monitoring helps in all except in: Show Answer

Q45) Automobiles discharge hydrocarbons and nitrous oxide in atmosphere which is further converted to: Show Answer

Q46) In Kolkata adults are suffereing from bronchitis TB, it is due to: Show Answer

Q47) Air pollution is highest in: Show Answer

Q48) Now-a-days DDT is not effective for killing mosquitoes because: Show Answer

Q49) The population of hawks and eagles is declining because: Show Answer

Q50) Certain epiphytic lichens indicate changing levels of atmospheric pollution, specially of: Show Answer

Q51) Ozone layer is chiefly disturbed by: Show Answer

Q52) Carbon monoxide is a very harmful pollutant because it: Show Answer

Q53) B. O. D. of a river was found to be very low, this means water: Show Answer

Q54) Nuclear power generates: Show Answer

Q55) Many organic substances or organisms help in clearing the water when found in: Show Answer

Q56) When pollution load is more in the lakes there cannot take place self-purification because: Show Answer

Q57) The level of tolerance of DDT is 10 ppm in case of Daphnia, therefore Daphnia: Show Answer

Q58) Better method of pest control is: Show Answer

Q59) The pollutants emitted by jet aeroplances in outer atmosphere as fluorocarbons are known as: Show Answer

Q60) The chemical which causes damage to WBC, bone marrow, spleen, lymph, nodes and lungs is: Show Answer

Q61) Name the chemicals which cause bone cancer and tissue degeneration: Show Answer

Q62) Nuclear explosion causes mainly: Show Answer

Q63) UV radiations to disinfect polluted water is not generally recommended because: Show Answer

Q64) UV radiations from sunlight cause the reaction that produce: Show Answer

Q65) What was the cause of "Yusho" disease which occurred in 1968 from a leak in canning factory? Show Answer

Q66) Which of the following is the main factor of water pollution? Show Answer

Q67) Activated sludge is associated with management of waste and it is a kind of: Show Answer

Q68) Which of the following is a largest source of formaldehyde vapour pollution in a room? Show Answer

Q69) Term 'nuclear winter' is associated with: Show Answer

Q70) Ozone layer in upper atmosphere is destroyed by: Show Answer

Q71) The most dangerous radioactive air pollutant is: Show Answer

Q72) Acid rain is caused by: Show Answer

Q73) Which of the following is a qualitative pollutant? Show Answer

Q74) DDT is a/an: Show Answer

Q75) Decomposition of domestic wastes under natural processes is known as: Show Answer

Q76) Which of the following causes fibrosis in lungs? Show Answer

Q77) Which of the following is secondary pollutant? Show Answer

Q78) The air pollution at source can be controlled by: Show Answer

Q79) Biochemical oxygen demand means: Show Answer

Q80) Hot water contains dissolved oxygen and then the BOD: Show Answer

Q81) The gas which is produced in rice paddy and is associated with global warming is: Show Answer

Q82) The newspaper contains one of the following toxic material. It is: Show Answer

Q83) The nitrifying bacteria are: Show Answer

Q84) Foul smell in the water of tanks, ponds etc is due to: Show Answer

Q85) Photochemical smog is related to the pollution of: Show Answer

Q86) Most important causative pollutant of soil may be: Show Answer

Q87) Greenhouse effect is enhanced in the environment by the gas: Show Answer

Q88) Most hazardous metal pollutant of automobile exhaust is: Show Answer

Q89) Which susbtance provides protection from carcinogens? Show Answer

Q90) Which is the main cause for desertification? Show Answer

Q91) Taj Mahal is threatened due to the effect of: Show Answer

Q92) When huge amount of sewage is dumped into a river, the BOD will: Show Answer

Q93) "Mango necrosis" is due to: Show Answer

Q94) Minamata disease of Japan which afflicted people with paralysis was traced to: Show Answer

Q95) Depleting of ozone umbrella is due to: Show Answer

Q96) The American aquatic weed, which has become a trouble in India is? Show Answer

Q97) Which of the following causes "Greenhouse effect"? Show Answer

Q98) NEERI is: Show Answer

Q99) As it passes into food chain, the concentration of DDT: Show Answer

Q100) Carbon monoxide kills because it destroys: Show Answer

Q101) DDT concentration recorded in human body has been: Show Answer

Q102) Lead is considered mainly: Show Answer

Q103) Which one of the following is not pollutant? Show Answer

Q104) A person has impaired nervous system and signs of madness due to continued intake of metal contaminated water. The metal is: Show Answer

Q105) What is the intensity of sound in normal conversation? Show Answer

Q106) Reason of lung cancer is: Show Answer

Q107) The result of Ozone hole is: Show Answer

Q108) Ozone hole means: Show Answer

Q109) Ganga Action plan was started in: Show Answer

Q110) Fluoride pollution mainly affects: Show Answer

Q111) BOD is a measure of: Show Answer

Q112) Frequent occurrence of water blooms in a lake indicates which of the following? Show Answer

Q113) A range of loudness of sound of 70-90 decibels is rated as: Show Answer

Q114) Chernobyl nuclear tragedy occurred on which date: Show Answer

Q115) Expand BOD: Show Answer

Q116) The term ' Bio-magnification' refers to the: Show Answer

Q117) This acts as bioindicator of air pollution: Show Answer

Q118) In 1984, the Bhopal gas tragedy took place because methyl isocyanate: Show Answer

Q119) Lead conc. In blood is considered alarming if it is: Show Answer

Q120) Blood analysis of a patient reveals an usually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been inhaling polluted air containing unusually high content of: Show Answer

Q121) Escherichia coli is used as an indicator organism to determine pollution of water with: Show Answer

Q122) A lake with an inflow of domestic sewage rich in organic waste, may result in: Show Answer

Q123) Nitrogen oxides produced from emission of automobiles and power plants are the sources of fine air borne particles which lead to: Show Answer

Q124) The noise produced in office is normally at the level of: Show Answer

Q125) Photosynthetic Active Radiation (PAR) has the following range of wavelengths: Show Answer

Q126) Which of the following is not used for disinfection of drinking water? Show Answer

Q127) Identify the correctly matched pair: Show Answer

Q128) Formation of non-functional methaemoglobin causes blue-baby syndrome. This is due to: Show Answer

Q129) Which one of the following statement pertaining to pollutants is correct? Show Answer

Q130) Examples of regional pollutions are: Show Answer

Q131) Greenhouse effect is due to: Show Answer

Q132) Greenhouse effect is the cumulative result of the influences of certain gases. Identify the gas which is not involved in this influence: Show Answer

Q133) Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities passed in the year: Show Answer

Q134) Photochemical smog pollution does not contain: Show Answer

Q135) Which of the following strategy is not a correct approach to reduce global warming? Show Answer

Q136) Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by: Show Answer

Q137) The Montreal protocol refers to: Show Answer

Q138) Which one of the following is an environment-related disorder with the correct main cause? Show Answer

Q139) In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order? Show Answer

Q140) In a coal fired power plant electrostatic precipitators are installed to control emission of: Show Answer

Q141) Ultrasound of how much frequency is beamed into human body for sonography? Show Answer

Q142) Which one of the following is not a bioindicator of water pollution? Show Answer

Q143) Increase of BOD in water leads to: Show Answer

Q144) Mercury pollution causes: Show Answer

Q145) A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this:
1. Lots of urea and phosphate fertilizer were used in the crops in the vicinity.
2. The area was sprayed with DDT by an aircraft.
3. The lake was turned green and stinky.
4. Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis. Show Answer

Q146) Eutrophication is often seen in: Show Answer

Q147) Which one of the following statements is wrong in case of Bhopal tragedy? Show Answer

Q148) Which one of the following organisms is used as indicator of water quality? Show Answer

Q149) A sewage treatment process in which a portion of the decomposer bacteria present in the waste is recycled into the beginning of the process, is called? Show Answer

Q150) Which one among the following chemicals is used for causing defoliation of forest trees? Show Answer

Q151) Warm ocean surge of the Peru Current recurring every 5-8 years or so in the East Pacific of South America is widely known as: Show Answer

Q152) Atmosphere absorbs maximum amount of: Show Answer

Q153) Water pollution: Show Answer

Q154) The noise pollution is measured in: Show Answer

Q155) Which of the following radiations is non-ionising and has more specific biological effect than others: Show Answer

Q156) Symptoms such as headache, ulcers, high blood pressure, fatigue and nausea are due to: Show Answer

Q157) Electrostatic precipitator is for: Show Answer

Q158) Lichens are indicators of: Show Answer

Q159) Radiation pollution can be controlled by: Show Answer

Q160) Symptoms of radiation are: Show Answer

Q161) Polluted water will most commonly contain: Show Answer

Q162) In contrast to tap water, BOD of pond water which is polluted by sewage waste will have: Show Answer

Q163) The most dangerous metal pollutant of automobile exhaust is: Show Answer

Q164) The major contributor of Greenhouse gases to the atmosphere is: Show Answer

Q165) Sewage drained into water bodies kill fishes because: Show Answer

Q166) In an aquatic food chain polluted by DDT, the tissue concentration of DDT would be highest in Show Answer

Q167) Algal bloom is caused by Show Answer

Q168) Minamata disease is caused by contamination of Show Answer

Q169) Increase skin cancer and high mutation rate are the result of Show Answer

Q170) Two lakes A & B are identical in all aspects except that lake A has higher temperature. Which of the following is true? Show Answer

Q171) In Effluent Treatment Plants (ETPs) at which stage micro-organism treatment in provided? Show Answer

Q172) In treatment of waste water biological treatment is Show Answer

Q173) By what degrees has the mean global temperature increased in the 20th century? Show Answer

Q174) Which is non-degradable pollutant? Show Answer

Q175) Which of the following is a natural pollutant? Show Answer

Q176) As the organic waste input in a water body increases Show Answer

Q177) Pick out the correct choice from the following Show Answer

Q178) What are the organisms that can tolerate high degrees of pollution called as? Show Answer

Q179) The process of nutrient enrichment of water is called as ________. Show Answer

Q180) When and where the Ozone hole was discovered? Show Answer

Q181) The Earth Summit, 1992, was held at Show Answer

Q182) In India, Jhum cultivation is practiced mainly in Show Answer

Q183) Thickness of ozone is measured in Show Answer

Q184) Green muffler is used against which type of pollution? Show Answer

Q185) Given below are the four statements each with two blanks. Select the option which correctly fills up the blank in any two statements.
A. Bhopal gas disaster took place on ____(i)____ 1984 and this day is now observed as the ____(ii)____ day in India.
B. ____(i)___ is degradable pollutant while ____(ii)_____ is non-degradable pollutant.
C. When pollutants are released from a single point is called ___(i)____ pollution, but when it is over a large area, then it is called ____(ii)____ pollution.
D. ___(i)___ is the world's most problematic aquatic weed, introduced in India for their lovely flowers, also called ____(ii)___ of Bengal. Show Answer

Q186) Which of the following is correct about "El Nino effect"? Show Answer

Q187) Which of the following is/are correct regarding Montreal Protocol?
I. Persistent organic pollutants.
II. Global warming and climate change.
III. To control the emission of ozone depleting substances.
IV. Bio-safety of genetically modified organisms. Show Answer

Q188) In India, the Air (Prevention and Control of Pollution) Act came into force in 1981 but was amended in 1987 to include Show Answer

Q189) The effect of today's radioactive fall out will be harmful to children of future generation than to children of present because Show Answer

Q190) When domestic sewage mixes with river water Show Answer

Q191) ______ are used in electrostatic precipitators Show Answer

Q192) Biological oxygen demand of _______ is the least. Show Answer

Q193) Due to eutrophication _______. Show Answer

Q194) _____ is the first step of sewage treatment. Show Answer

Q195) We and our surroundings together are called Show Answer

Q196) Which of the following is not an environmental problem? Show Answer

Q197) Volcano is _______ source of pollution. Show Answer

Q198) Which method is used for the removal of sulphur dioxide and ammonia from the polluted air? Show Answer

Q199) BOD is _______ in polluted water and _______ in potable water. Show Answer

Q200) Which pollutants are responsible for bronchitis? Show Answer

Q201) Which method is used to control pollutants of particulate nature? Show Answer

Q202) Which of the following figures shows correct relative contribution of greenhouse gases to global warming? Show Answer

Q203) Pollution in big cities can be controlled to a large extent by -
A. Improving traffic condition and road.
B. Road side plantation.
C. Proper disposal of garbage and domestic as well as municipal wastes.
D. Cannot be controlled. Show Answer

Q204) Primary pollutants used in the synthesis of photochemical smog are Show Answer

Q205) DDT -
A. is a non-degradable pollutant
B. shows bio-magnification
C. is harmful to fishes and birds
D. is a pesticide Show Answer

Q206) Which of the following will be found in polluted water?
A. B. G. A.
B. Larvae of stonefly
C. Water hyacinth
D. Sewage fungi Show Answer

Q207) Identify the correct matches -
A. Environmental (protection) act, 1986 - Protection and quality improvement of air, water and soil.
B. Kyota protocol - To mitigate climate change, to reduce green house gases.
C. Montreal protocol - ODS reduction.
D. Chipko movement - Trees protection. Show Answer

Q208) There are working, 'EcoSan' toilets in many areas of Show Answer

Q209) Which statement is false? Show Answer

Q210) DDT causes Show Answer

Q211) Which of the following is true -
A. Pollution is any undesirable change in physical, chemical or biological characteristic of air, land water or soil.
B. Agents that bring about such an undesirable change are called pollutants.
C. In order to control environmental pollution, the Government of India has passed the environment (Protection) Act, 1976 to protect and improve the quality of our environment. Show Answer

Q212) Which of the following is true about composition of waste water?
A. Suspended solids e.g. Sand, silt and clay - 0.1%.
B. Colloidal material e.g. Faecal matter, bacteria, cloth and paper fibres - 0.1%.
C. Dissovled materials e.g. Nutrients, (Nitrate, Ammonia, Phosphate, Calcium) - 0.1%.
D. All of the above together constitute 0.1% of the waste water. Show Answer

Q213) The most widely used method for removing particulate matter is not associated with which of the following? Show Answer

Q214) Concentration of DDT for first trophic level (phytoplanktons) and top trophic level (fish eating birds) is respectively in aquatic food chains if DDT is 0.003 ppb in water is Show Answer

Q215) Cleaning of waste water in Arcata Marsh involves Show Answer

Q216) Eco-san toilets are not associated with which of the following? Show Answer

Q217) Choose the correct sequence of greenhouse gases with respect to their relative contribution to global warming in increasing order Show Answer

Q218) Choose the odd one our w.r.t. ozone depletion in the stratosphere Show Answer

Q219) Bio-magnification refers to increase in concentration of the toxicant at successive trophic levels, this happens because Show Answer

Q220) After the conventional sedimentation, filtering and chlorine treatment, lots of dangerous pollutants still remain. To combat this, the biologists developed a series of six connected marshes when appropriate plants, algae, fungi and bacteria were seeded into this area, which -
A. Neutralise the pollutants
B. Absorb the pollutants
C. Assimilate the pollutants Show Answer

Q221) How much of the e-wastes generated in the developed world are exported to developing countries Show Answer

Q222) The world summit on sustainable development held in 2002 in _____, _____ countries pledged their commitment to achieve by 2010. Show Answer

Q223) As the exhaust passes through the catalytic converter Show Answer

Q224) Photochemical smog differs from classical/London smog in Show Answer

Q225) An international initiative taken in _______ to mitigate climate change and to reduce greenhouse emission is called _______. Show Answer

Q226) The thickness of ozone over poles changes with the season being lowest in Show Answer

Q227) Read the following statements given here below and select the right answer -
A. Kyoto protocol, 1997 conference obtained commitments from different countries for reducing overall green house gas emission at level 5% below 1990 by 2008 - 2012.
B. Montreal protocol was signed in 1987.
C. Montreal protocol became effective in 1989.
D. Montreal protocol was signed to control the emission of ozone depleting substances. Show Answer

Q228) Amrita Devi Bishnoi Wildlife protection Award is given to the individuals or communities from Show Answer

Q229) The Ozone hole over Antarctica develops each year between Show Answer

Q230) In collaboration with which one, Ahmad Khan proved that blends of polyblend and bitumen, when used to lay roads, enhanced the bitumen's water repellent properties and helped to increase road-life by a factor of three. Show Answer

Q231) Heavy metals defined as elements with density ________ are harmful to ecological systems. Show Answer

Q232) All automobiles and fuel-petrol and diesel were to have met the Euro III emission specifications in some cities from 1 April 2005 and have to meet the Euro IV norms by Show Answer

Q233) What was the focus of Rachel Carson's book Silent Spring in 1962? Show Answer

Q234) Which of the following is not one of the major environment problems resulting from human interference in the nitrogen cycle? Show Answer

Q235) Which of the following is not a major positive feedback mechanism in which the activity of humans to increase global climate temperatures leads to an even further increase? Show Answer

Q236) Which of the following is not a greenhouse gas? Show Answer

Q237) Which of the following statements about eutrophication are TRUE?
1. It can be a naturally occurring process.
2. It is commonly found in standing rather than running water.
3. It can lead to oxygen depletion.
4. It is commonly associated with high levels of nitrates and sulphates.
5. It is commonly associated with high levels of phosphates and nitrates. Show Answer

Q238) The device on an automobile that filters harmful pollutants out of the exhaust before it enters the air is a(n) _______. Show Answer

Q239) What did Chernobyl, Three Mile Island, the Love Canal, and Bhopal, India all have in common? Show Answer

Q240) What contributes the most to acid rain? Show Answer

Q241) Which of the following techniques is not example of bioremediation or phytoremediation? Show Answer

Q242) A dose that is represented as LD50. Show Answer

Q243) Some organic waste pollutants are of recent concern because they can act as endocrine disruptors which means they Show Answer

Q244) Temperature inversions, heat islands, and dust domes are the result of ______. Show Answer

Q245) The thickness of ozone in the column of air from the ground to top of the atmosphere is measured in terms of Show Answer

Q246) The phenomenon where cool, dense air sits under a layer of lighter warmer air is known as a _______. Show Answer

Q247) Which one is incorrect? Show Answer

Q248) The addition of sewage and other organic material into a water supply _______. Show Answer

Q249) The ozone in the earth's atmosphere screens out Show Answer

Q250) What part of the atmosphere contains the ozone layer? i.e. where is most of the ozone? Show Answer

Q251) I. Part of ozone is destroyed over poles during polar spring.
II. Ozone present in stratosphere filters out UV-B.
III. Ozone hole over Antarctica was first detected by Farman et al.
IV. Ozone hole over Antarctica appears during August, September.
V. CFCs split up in stratosphere to release chlorine by the action of UV-C.
Which of the above statements is false? Show Answer

Q252) You can protect yourself from too much exposure to UV radiation by taking two of the following precautions. Which two? Show Answer

Q253) Although the production of ozone depleting CFCs is being controlled by the Montreal Protocol, CFCs are still found in certain products in many industrialized countries. Which of the following two may contain CFCs? Show Answer

Q254) The single best way to reduce acid deposition would be to Show Answer

Q255) Which of the following contributes to both global warming and ozone thinning? Show Answer

Q256) Which part of the CFC molecule attacks ozone? Show Answer

Q257) I. Montreal Protocol was signed in 1987.
II. Earth summit 1992 was held at Rio-de-Janeiro.
III. World Environment Day is 5 June.
IV. World Environment Day coincides with commemoration of First United Nations Conference on Human Environment.
V. At Do below 4 mg/L, water at normal temperature is heavily polluted.
Which of the above statements is correct? Show Answer

Q258) Since the Montreal Protocol was signed Show Answer

Q259) Water with a dissolved oxygen content (DO) of 8 to 9 ppm is considered Show Answer

Q260) Cultural or Accelerated Eutrophication lakes is most often caused by input of Show Answer

Q261) Which of the following is a major ground water pollutant in parts of Indian and Bangladesh? Show Answer

Q262) Secondary sewage treatment Show Answer

Q263) Which of the following is considered the greatest problem associated with the use of pesticides? Show Answer

Q264) Fill up the blanks:
A. Clouds and gases reflect about ___I___ of the incoming solar radiation, and absorb some of it but almost half of incoming solar radiation falls on Earth's surface heating it, while a small proprotion is reflected back. Earth's surface re-emits heat in the form of ____II____ radiation but part of this does not escape into space as atmospheric gases (e.g. carbon dioxide, ___III____, etc.) absorb a major fraction of it.
B. During the past century, the temperature of Earth has increased by ___I___ most of it during the last three decades. Scientists believe that this rise in temperature is leading to deleterious changes in the environment and resulting in odd climatic changes (e.g. ___II___), thus leading to increased melting of polar ice caps as well as of other places like the Himalayan snow caps.
C. In human eye, cornea absorbs UV-B radiation, and a high does of UV-B causes inflammation of cornea, called ___I____, cataract, etc. Such exposure may permanently damage the cornea. Show Answer

Q265) Fill up the blanks :
A. ___I____ were adopted as the substitute for open-burning dumps. In a ___II___, wastes are dumped in a depression or trench after compacting and covered with dirt everyday.
B. Deforestation is the conversion of forested areas to non-forested ones. According to an estimate almost ___I___ percent forests have been lost in the tropics, compared to only ___II___ percent in the temperature region. The present scenario of deforestation is particularly grim in India. At the beginning of the twentieth century forests covered about ____III___ percent of the land of India. By the end of the century, it shrunk to ___IV___ percent, whereas the National Forest Policy (1988) of India has recommended 33 percent forest cover for the plains and 67 percent for the hills. Show Answer

Q266) One of the consequences of EI Nino is a decline in the number of fish caught along the coasts of Ecuador and Peru. This decline is primarily because Show Answer

Q267) Pollution of big cities can be controlled to large extent by Show Answer

Q268) Among the following environmental pollutants which has the problem of bio-magnification Show Answer

Q269) The compound mainly responsible for pollution which caused the ill famed Bhopal gas tragedy was Show Answer

Q270) UV radiation is injurious to plants because it Show Answer

Q271) The Kyoto Protocol specifies regulation on the emission of green house gases. It defines a term known as "Carbon-Credits". The following statements pertain to Carbon-Credits:
I. The mandatory limit of Carbon-Credit for each country is directly proportional to its size and population.
II. One Carbon-Credit defines the emission on one ton of carbon dioxide or equivalent gases responsible for green-house effect.
III. Carbon-Credits are exchangeable among countries/industries. I. An industry emitting higher than prescribed limit can do so by purchasing Carbon-Credits. Which of the above statements are true? Show Answer

Q272) "Good ozone" is found in the Show Answer

Q273) Which of the following is a chlorofluocarbon? Show Answer

Q274) Mass of living matter at a trophic level in an area at any time is called? Show Answer

Q275) Which one of the following expanded forms of the following acronyms is correct? Show Answer

Q276) The domestic sewage in large cities Show Answer

Q277) If a water body is contaminated with a toxicant, its bio-magnification will be more marked in Show Answer

Q278) Environment Protection Act, to protect and improve the quality of our environmental air, water and soil was passed in the year Show Answer

Q279) In domestic sewage, impurities in the form of suspended solids, colloidal material and dissolved materials, are about Show Answer

Q280) The range of bio-magnification of DDT in an aquatic food chain, if starting from 0.003 ppb level in water may go at fish-eating bird level up to Show Answer

Q281) In an area where DDT has been used extensively, the population of birds declined significantly because Show Answer

Q282) Which one of the following is a wrong statement? Show Answer

Q283) Measuring Biochemical Oxygen Demand (BOD) is a method used for Show Answer

Q284) Which of the following statements regarding the greenhouse effect has the lowest degree of certainty? Show Answer

Q285) Which of the following air pollutants has shown the greatest decline in recent years? Show Answer

Q286) Bhopal gas tragedy of 1984 took place because methyl isocyanate reacted with Show Answer

Q287) Go through the statements.
I. Domestic waste is biodegradable.
II. First effect of noise is anxiety and stress reaction.
III. Climate of the world is threatened by increasing amount of atmospheric carbon dioxide.
IV. BOD is related to inorganic pollutants.
V. Acidic rain is due to water pollution.
VI. Global warming will cause rise in level of ocean and in ice-caps.
How many of the above statements are wrong? Show Answer

Q288) The ideal modern sewage system is one in which Show Answer

Q289) The term activated sludge is used for a common secondary treatment technique because Show Answer

Q290) One impediment to the use of treated sludge as agricultural fertilizer is Show Answer

Q291) Global warming can be controlled by Show Answer

Q292) The Air Prevention and Control of Pollution Act came into force in Show Answer

Q293) Kyoto Protocol was endorsed at Show Answer

Q294) A citizen group called Friends of the Arcata Marsh (FOAM) basically belongs to Show Answer

Q295) Warm ocean surge of Peru current that recurs after 5-8 years in East Pacific along South America is Show Answer

Q296) A location with luxuriant growth of lichens on the trees indicates that the Show Answer

Q297) The zone of atmosphere in which the ozone layer is present is called Show Answer

Q298) A scrubber in the exhaust of a chemical industrial plant removes Show Answer

Q299) Main cause of Eutrophication is Show Answer

Q300) Which of the following is true for eutrophicated water body? Show Answer

Q301) If there was no carbon dioxide in the earth's atmosphere, the temperature of the earth surface would be Show Answer

Q302) The prime contaminants in lakes eutrophied by sewage and agricultural wastes are Show Answer

Q303) The process of nutrient enrichment of water, and subsequent loss of species diversity is referred to as Show Answer

Q304) What percentage of impurities make domestic sewage unfit for human use? Show Answer

Q305) Go through the following statements.
A. It is the natural aging of a lake by nutrient enrichment of its water.
B. In a young lake the water is cold and clear and supports less life.
C. The nutrients such as sulphur and phosphorus encourage the growth of aquatic organisms in the lake.
D. Pollutants released by man radically accelerate the aging process of a lake.
E. Overgrowth of algae leads to scum that depletes the level of dissolved oxygen in the water.
Which of the above statements does not apply to eutrophication? Show Answer

Q306) The second commitment period of Kyoto Protocol was extended from Show Answer

Q307) Who proved that blends of polyblend (plastic waste) and bitumen, when used to lay roads, enhanced the bitumen's water repellent properties and helped to increase road life? Show Answer

Q308) The polluting strength of sewage is usually characterized by its. Show Answer

Q309) Which of the following would most likely help to slow down the greenhouse effect? Show Answer

Q310) Wildlife Protection Act India was implemented in the year Show Answer

Q311) Which one of the following combinations is wrong? Show Answer

Q312) Relationship between DO an BOD is that they Show Answer

Q313) Select the correct statement(s) pertaining to Chipko movement.
I. It was led by Sunderlal Bhauguna.
II. It was a tree hugging movement.
III. It commenced in the Tehri-Garhwal district.
IV. It received global attention on environmental protection. Show Answer

Q314) Select the non-degradable pollutant(s) from the following.
I. Plastic
II. Organochloride pesticides
III. Heavy metals
IV. Domestic sewage Show Answer

Q315) Now-a-days, use of DDT as insecticide is banned because Show Answer

Q316) Rachel Carson's famous book "Silent Spring" is related to Show Answer

Q317) Which of the following is not one of the prime health risks associated with greater UV radiations through the atmosphere due to depletion of stratospheric ozone? Show Answer

Q318) High value of BOD (Biochemical Oxygen Demand) indicates that Show Answer

Q319) The UN Conference of Parties on climate change in the year 2011 was held in Show Answer

Q320) Acid rain is caused by increase in the atmospheric concentration of Show Answer

Q321) Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of Show Answer

Q322) The UN conference of Parties on climate change in the year 2012 was held at Show Answer

Q323) Increase in concentration of the toxicant at successive trophic levels is known as Show Answer

Q324) Recently Paris held a CoP summit, which CoP summit was this? Show Answer

Q325) Give the full form of CoP in ecology Show Answer

Q326) Joint Forest Management Concept was introduced in India during Show Answer

Q327) A river with an inflow of domestic sewage rich in organic waste may result in Show Answer

Q328) Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers Show Answer

Q329) A lake which is rich in organic waste may result in Show Answer

Q330) The highest DDT concentration in aquatic food chain shall occur in Show Answer

Q331) Phenomenon involved in increasing the concentration of non-degradable pollutants in a trophic level of an ecosystem is called Show Answer

Q332) 'Ozone layer' is located in Show Answer

Q333) Which of the following combination is wrong? Show Answer

Q334) Which of the following binds with haemoglobin irreversibly? Show Answer

Q335) Black-foot disease is caused due to polluation of ground water as a consequence of increased seepage of Show Answer

Q336) Catalytic converters are fitted into automobiles to reduce the emission of harmful gases. Catalytic
converters changes unburnt hydrocarbons into Show Answer

Q337) What percentage of total area in hilly regions does the National Forest Policy (1988) suggest to be under
forests? Show Answer

Q338) Which one of following is not an air pollutant? Show Answer

Q339) DDT residues are rapidly passed through food chain causing biomagnifications because DDT is Show Answer

Q340) Rain is called acid rain when its pH is below Show Answer

Q341) CFCs are responsible for Show Answer

Q342) Acid rain is due to Show Answer

Q343) Noise is Show Answer

Q344) Domestic sewage contains nutrients like nitrogen and phosphorus which favours the excessive growth of
planktonic (free floating) algae which can accelerate which of the following phenomenon? Show Answer

Q345) High level radioactive waste can be managed in which of the following ways? Show Answer

Q346) Polyblend is mixed with …A… to lay roads in …B… . Complete the given statement by choosing appropriate
option for A and B Show Answer

Q347) Which one of the following is mainly responsible for green houses effect? Show Answer

Q348) Consider the following statements
I. Soil without a vegetation cover is eroded by both wind and water
II. Excessive irrigation results in water logging of soil
III. Increased salt concentration damages agriculture
Which of the statements given above are correct? Show Answer

Q349) In India, the Air Prevention and Control of pollution Act came into force in …A…, but was amended in …B…
to include …C… as an air pollutant
Complete the given statement by choosing appropriate option for A-C Show Answer

Q350) Which method is used to remove particulate matter present in exhaust of thermal power plant? Show Answer

Q351) Restoring a forest cover over an area where one existed earlier but was removed at some point of time in
the past is called Show Answer

Q352) For the control of air pollution in Delhi, all buses of Delhi were converted to run on …A… by the end of
…B… as per the directives of the …C…
Complete the given statement by choosing appropriate options for A-C Show Answer

Q353) Green house gases are Show Answer

Q354) In which state of India, Ecosave toilets are not found? Show Answer

Q355) Identify the correctly matched pair. Show Answer

Q356) The main cause of pollution is metrocities is Show Answer

Q357) Chipko movement (1974) is the world’s known eco development programme, started by Sunder Lal
Bahuguna in Tehri Garhwal (Uttarakhand). It is associated with Show Answer

Q358) Which one of the following is a most efficient device to eliminate particulate matters from the industrial
emissions? Show Answer

Q359) Kyoto protocol is related with Show Answer

Q360) …….. is an undesirable change in physical, chemical or biological characteristics of air, land, water or soil Show Answer

Q361) For the best ecological balance, land mass of a country in plains covered with forests Show Answer

Q362) Desertification has become a major problem due to Show Answer

Q363) Why CNG is considered as good fuel over diesel/petrol?
I. CNG burns most efficiently without leaving any unburnt remnant behind
II. CNG is cheaper than petrol or diesel
III. CNG cannot be siphoned off by thieves and adulterated like petrol or diesel
Which of the statements given above are correct? Show Answer

Q364) Eutrophicated lake has BOD Show Answer

Q365) A sewage treatment process, in which a portion of the decomposer bacteria present in the waste is
recycled into the beginning of the process, is called Show Answer

Q366) Consider the following statements about harmful effects of radioactive pollution
I. Radiations from nuclear wastes causes mutation at a very high rate
II. At high doses, nuclear radiations are lethal
III. At low doses, radiations cause disorders and cancer
Which of the statements given above are correct? Show Answer

Q367) Photochemical smog formed in congested metropolitan cities mainly consist of Show Answer

Q368) If there is no greenhouse effect, the average temperature at the surface of earth would have been Show Answer

Q369) A disease caused by eating fish contaminated by industrial waste containing mercury compounds is known
as Show Answer

Q370) The cause of decline in the population of reptiles and birds is Show Answer

Q371) Consider the following statements regarding deforestation
I. It is removal, decrease or deterioration of forest cover of an area
II. It leads to soil erosion
III. Deforestation often causes flash floods
IV. Deforested area can be used variously as cropland, industrial area, residential area, fallow land, etc.
Which of the statements given above are correct? Show Answer

Q372) Increase in concentration of a toxicant at successive trophic levels is called Show Answer

Q373) In the town of Arcata situated on northern coast of …A… , an integrated waste water treatment process
was developed with the help of biologists from …B… . Here A and B refers to Show Answer

Q374) Secondary sewage treatment is mainly a Show Answer

Q375) Which of the following diseases is related to cadmium pollution? Show Answer

Q376) Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This occurs due
to disturbed Show Answer

Q377) Which of the following are the main harmful effects of deforestation?
I. Increase in carbon dioxide concentration in atmosphere
II. Loss of biodiversity due to habitat destruction
III. Disturbance in hydrologic cycle
IV. Desertification
Which of the statements given above are correct? Show Answer

Q378) Study the following statements regarding Ecosave toilet and select the incorrect ones Show Answer

Q379) The atmosphere around earth is warmed because Show Answer

Q380) Earth’s climate Show Answer

Q381) Jhum cultivation refers to Show Answer

Q382) Which of the following is not a green house gas? Show Answer

Q383) Minamata occurs in Show Answer

Q384) In an area where DDT had been used extensively, the population of birds declined significantly because Show Answer

Q385) The concept of Joint Forest Management (JFM) involves Show Answer

Q386) According to Kyoto protocol, the major nations abide to reduce concentration of green –house gases by Show Answer

Q387) This pollutant causes burning sensation of throat and eyes and vomiting sensation Show Answer

Q388) Drinking of mineral water with very low level of pesticides (about 0.02 ppm) for long periods may Show Answer

Q389) The major goal of the green revolution was to Show Answer

Q390) In scrubber, the exhaust is passed through a Show Answer

Q391) During day time, sound level is silent zone is Show Answer

Q392) The unfavorable alteration of environment due to human activities is termed as Show Answer

Q393) Which one of the following is a correct option with reference to pathogenic bacteria and DDT? Show Answer

Q394) Expanded from of BOD is Show Answer

Q395) Relative Biological Effectiveness (RBE) usually refers to the damage caused by Show Answer

Q396) The possible beneficial aspect of grazing animals is the Show Answer

Q397) Ozone hole results in Show Answer

Q398) Given below a set of health problems
I. lack of sleep
II. high blood pressure
III. stress
IV. complete or partial hearing
V. anxiety
Which of the health problems given above are caused by noise pollution? Show Answer

Q399) The intensity levels of whispering noise is Show Answer

Q400) Which of the following process is a cyclic, zero-waste procedure where waste products from one process
are cycled in as nutrients for other processes, allowing maximum utilisation of resources and increasing
the efficiency of production? Show Answer

Q401) The main component of photochemical smog is Show Answer

Q402) The soil pollutants that affect the food chain and food web by killing microorganisms and plants are Show Answer

Q403) In acid rain, SO2 accounts by Show Answer

Q404) According to the Central Pollution Control Board (CPCB), particles that are responsible for causing great
harm to human health are of diameter Show Answer

Q405) Which of the following are the causes for deforestation?
I. Human settlements
II. Forest fires
III. Hydroelectric projects
IV. Overgrazing by livestock
V. Demand of wood
Which of the statements given above are correct? Show Answer

Q406) BOD is concerned with Show Answer

Q407) In electrostatic precipitator, electrode wires are provided with an electric current of several thousand
volts, which produces a corona that release …A…
These electron attach to dust particle and given them a …B… charge within a very small fraction of a
second. Here A and B refers to Show Answer

Q408) Cutting of trees in a forest is called Show Answer

Q409) Which one of the following is a major pollutant of automobile gases? Show Answer

Q410) Which of the following are the example of industrial solid wastes? Show Answer

Q411) World most problematic aquatic weed is Show Answer

Q412) Solid waste can be Show Answer

Q413) Addition of phosphate and nitrates/fertiliser into water and that water ultimately draining into lake firstly
affects
Show Answer

Q414) Biomagnification is highest in Show Answer

Q415) Polyblend Show Answer

Q416) The ozone layer is found in Show Answer

Q417) Which of the following health problem originates due to the inhalation of fine particulate matter? Show Answer

Q418) Irreparable computers and other electronic goods are known as Show Answer

Q419) Eutrophication is excessive growth of algae, plants and animals in water-bodies due to nutrient
enrichment particularly with Show Answer

Q420) Peeling of ozone umbrella, which protects us from UV rays, is caused by Show Answer

Q421) Chipko movement was started in Garhwal, Himalayas in Show Answer

Q422) Ultraviolet radiations from sunlight causes a reaction that produces Show Answer

Q423) Ozone hole is largest over Show Answer

Q424) Ozone depletion is occurring widely in Show Answer

Q425) Chipko movement was successfully launched by Show Answer

Q426) Stirred-tank bioreactors have been designed for Show Answer

Q427) What did Chernobyl, Three Mile Island, the Love Canal and Bhopal, India all have in common? Show Answer

Q428) Which of the following statement pertaining to pollutants is correct? Show Answer

Q429) Which of the following are the indicators of pollution? Show Answer

Q430) To remove which pollutants, enzymatic filters are used? Show Answer

Q431) What is the major cause of desertification? Show Answer

Q432) ESP is to arrest Show Answer

Q433) Reforestation is useful for Show Answer

Q434) Which of the following metals is a water pollutant and causes sterility in human being? Show Answer

Q435) Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal
waste water into natural surface water, is Show Answer

Q436) Eutrophication is caused by Show Answer

Q437) Examples of regional pollution are Show Answer

Q438) World Summit on Sustainable Development (2002) was held in Show Answer

Q439) Which statement represents the harmful effect of depletion of earth’s ozone layer? Show Answer

Q440) Which of the following statement is not correct? Show Answer

Q441) Euro II norms were stipulated to control sulphur content at 350 ppm in …A… and 150 ppm in …B…. and
aromatic hydrocarbons are to be contained at …C…
Complete the given statement by choosing appropriate option for A-C Show Answer

Q442) World environment day is celebrated on Show Answer

Q443) A lake with nutrients is called Show Answer

Q444) Three mile island and chernobyl disasters are associated with accidental leakage of Show Answer

Q445) Ozone is spread in the swimming pool because Show Answer

Q446) Which of the following methods are useful for solid waste disposal?
I. Open burning
II. Sanitary landfills
III. Rag-pickers and kabadiwallahs
IV. Natural breakdown
V. Recycling
VI. Incineration
Choose the correct option Show Answer

Q447) Checking of re-radiating heat by atmospheric dust O3, CO2and water vapours is Show Answer

Q448) Of the following four metropolitan Indian cities, where polluted air hangs above like a cloud is Show Answer

Q449) Which of the following is a prime health risks associated with greater UV radiation through the
atmosphere due to depletion of stratospheric ozone? Show Answer

Q450) Which of the following are correctly matched?
I. Arsenic poisoning - Black foot disease
II. Secondary effluent
treatment - Biological process
III. Pyrolysis - Solid soil waste disposal
IV. Tubifex - Water pollution indicator
V. Biomagnification - Degradable pollutants Show Answer

Q451) Irrepairable goods, computers and other electronic devices are known as Show Answer

Q452) Consider the following statements
I. Reforestation is the process of restoring a forest that once existed but was removed at some point of
time in the past
II. Reforestation may occur naturally in a deforested area
III. A tree plantation movement or Van Mahotsava is being carried out in India since 1982
Which of the statements given above are correct? Show Answer

Q453) Scrubber is used to remove gases like Show Answer

Q454) Consider the following statements about eutrophication
I. Eutrophication is the natural ageing of a water body by nutrient enrichment
II. The accelerated ageing of lakes due to sewage and agricultural and industrial wastes is called cultural or
accelerated eutrophication
III. The plant nutrients responsible for eutrophication are nitrates and phosphates
IV. Phosphates and nitrates accelerate the growth of algae which utilise oxygen and may deoxygenate the
water enough to kill the fish and other aquatic animals
Which of the statements given above are correct? Show Answer

Q455) A sewage treatment process in which a part of decomposer bacteria present in the waste is recycled into
the starting of the process is called Show Answer

Q456) Cigarette smoking causes Show Answer

Q457) Ozone saves the biosphere by absorbing the high energy radiation called Show Answer

Q458) The fertile top soil is removed by human activities like Show Answer

Q459) Which of the following statement is correct? Show Answer

Q460) Algal blooms imparts a distinct colour to water due to Show Answer

Q461) Pollution is not caused by Show Answer

Q462) The term ‘biomagnification’ refers to the Show Answer

Q463) Carbon dioxide is called green house gas because it is Show Answer

Q464) One of the following acts as secondary pollutant Show Answer

Q465) Which of the following toxic materials was present in Minamata bay of Japan? Show Answer

Q466) Global agreement in specific control strategies to reduce the release of ozone depleting substances, was
adopted by Show Answer

Q467) Ecological sanitation is a sustainable system for handling human excreta, using dry composting toilets.
Such ‘Ecosave’ toilets are working in Show Answer

Q468) Common indicator organism of water pollution is Show Answer

Q469) Kyoto protocol has specified the commitments of different countries Show Answer

Q470) Which of the following groups of gases cause photochemical smog? Show Answer

Q471) The phenomenon by which certain pollutants (e.g., DDT, Mercury) accumulates in the body tissues in
increasing concentration is called Show Answer

Q472) Read the following statements carefully and select the correct ones
I. UV rays essential for the production as well as degradation of ozone gasII. Ozone present in ionosphere acts as a shield absorbing UV radiation coming from the sun
III. One fourth of the incoming solar radiation is reflected by the atmospheric gases and clouds and only
half of the incoming solar radiation falls on the earth’s surface, heating it. Of this only a small portion is
reflected back Show Answer

Q473) In India, the heaviest demand of forests is for Show Answer

Q474) The ultraviolet radiations in the stratosphere are absorbed by Show Answer

Q475) Carbon monoxide is a pollutant because it Show Answer

Q476) It is estimated that out of the total global warming, the relative contribution of CO2, CH4, CFCs and N2O are
found respectively as Show Answer

Q477) In big cities, the major atmospheric pollutant is Show Answer

Q478) Steps taken by the Government of India to control air pollution include Show Answer

Q479) Which of the following plants is used for the purification of water? Show Answer

Q480) Which of the following is non-biodegradable? Show Answer

Q481) Minamata disease was caused due to the consumption of Show Answer

Q482) Which one among the following is likely to have the highest level of DDT deposition in its body? Show Answer

Q483) ‘Bad’ ozone is formed in Show Answer

Q484) The thickness of ozone in a column of air from the ground to the top of the atmosphere is measured in
terms of Show Answer

Q485) Green-house effect refers to Show Answer

Q486) I. Radiation from nuclear waste is …A… at a very high rate
II. At low doses, radiations causes …B…
Complete the given statement by choosing appropriate option for A and B Show Answer

Q487) A pollutant can best defined as it Show Answer

Q488) Global warming can be controlled by
I. reducing deforestation
II. planting trees (afforestation)
III. slowing down the growth of human population
IV. reduction of emission of greenhouse gases into the atmosphere
V. cutting down the use of fossil fuels
Which of the statement given above are correct? Show Answer

Q489) What is true about the Euro II norms? Show Answer

Q490) Montreal protocol, which calls for appropriate action to protect the ozone layer from human activities was
passed in the year Show Answer

Q491) Consider the following statements about scrubber
I. It is used to remove gases like sulphur dioxide from industrial exhaust
II. In a scrubber, the exhaust is passed through a spray of water or lime
III. Water dissolves gases and lime reacts with sulphur dioxide to form a precipitate of calcium sulphate
and sulphide
Which of the statements given above are correct? Show Answer

Q492) Excess atmospheric CO2 increase green house effect as CO2 Show Answer

Q493) Removal of forest areas to fulfil the needs of growing human population is called Show Answer

Q494) Which of the following is a secondary air pollution? Show Answer

Q495) Maximum green house gases are released by Show Answer

Q496) In 2002 AD, according to research, the concentration of CFCsreached to Show Answer

Q497) Consider the following statements about pollution
I. Pollution is an undesirable change in physical, chemical or biological characteristics of air, land, water or
soil
II. The air act was amendid in 1987 to include noise as air pollutant
III. In order to control environmental pollution, the Government of India has passed the environment
Protection Act, 1976 to protect and improve the quality of our environment
Which of the statements given above are correct? Show Answer

Q498) Which Act was formulated in the year 1986? Show Answer

Q499) Which one of the following pairs is mismatched? Show Answer

Q500) Good ozone is formed in Show Answer

Q501) Ozone layer is depleted by Show Answer

Q502) Catalytic converters, which are fitted into automobiles for reducing the emission of poisonous gases
possesses which of the following metals used as catalyst? Show Answer

Q503) El Nino effect is closely associated with Show Answer

Q504) One of the main reasons of soil erosion in India is Show Answer

Q505) Maximum noise permissible during day time in residential areas is Show Answer

Q506) When the noise was recognized as an air pollutant? Show Answer

Q507) Green house effect is the cumulative result of the influences of certain gases. Identify the gas, which is not
involved in this influence? Show Answer

Q508) Taj Mahal marble is affected by Show Answer

Q509) An international treaty, Montreal Protocol in 1987 to curb the emission of ozone depleting substances, was
held at Show Answer

Q510) The natural phenomenon of keeping earthworm due to presence of certain gases in the atmosphere is
called Show Answer

Q511) Rise in temperature leads to deleterious changes in environment resulting in odd climatic changes called Show Answer

Q512) A lake with an inflow of domestic sewage rich in organic waste may result in Show Answer

Q513) Acid rain is mainly caused due to increase in the levels of the gas(es) Show Answer

Q514) Nutrient enrichment of a lake will cause Show Answer

Q515) Sound becomes a hazardous noise pollution if its level exceeds Show Answer

Q516) Old pollutant amongst the following is Show Answer

Q517) What is soil erosion? Show Answer

Q518) Ozone depletion in stratosphere shall result in Show Answer

Q519) The oxygen concentration at the floor of the deep ponds and lakes is very low because of the Show Answer

Q520) Which of the following is not an air pollutant? Show Answer

Q521) Montreal protocol aims at Show Answer

Q522) Sulphur dioxide causes Show Answer

Q523) Forests in India, according to Central Forestry Commission (1980) are about Show Answer

Q524) Which of the following are advantages of ecological sanitation?
I. It is a practical, hygienic and efficient method of waste disposal
II. It is cost effective
III. Human excreta can be recycled into natural fertilisers, to replace chemical fertilisers Show Answer

Q525) Which element is caused of itai-itai disease? Show Answer

Q526) Organic farming is the technique of raising crops through the use of Show Answer

Q527) Loss of forest, urbanization, increasing pollution are all due to Show Answer

Q528) Motor vehicles equipped with catalytic converter should use unleaded petrol because lead Show Answer

Q529) The accelerated ageing of lakes due to sewage and agricultural and industrial waste is called Show Answer

Q530) Which of the following is biodegradable pollutant? Show Answer

Q531) Eutrophication results in reduction of Show Answer

Q532) Which one of the following gases can deplete ozone layer in the upper atmosphere? Show Answer

Q533) Arrange the following options in ascending order of their BOD value.
I. Sample of highly polluted pond water.
II. Sample from unpolluted pond water.
III. Distilled water Show Answer

Q534) In the treatment of waste water discharge, which treatment stage involves biological treatment? Show Answer

Q535) Increase in toxic concentration from one trophic level to another trophic level is called Show Answer

Q536) Which one of the following is the correct percentage of the two(out of the total of four) green house gases
that contribute to the total global warming? Show Answer

Q537) Which of the following is a point source of pollution Show Answer

Q538) Which of the following strategies is not a correct approach to reduce global warming? Show Answer

Q539) Air pollutants
I. cause injury to all living organism
II. reduce growth and yield of crops and causes premature death of plants
III. affects the respiratory system of humans and animals
Which of the statements given above are correct? Show Answer

Q540) Gaseous pollutants can be controlled by Show Answer

Q541) CFCs are not recommended to be used in refrigerators because they Show Answer

Q542) Green house effect with respect to global climate refers to Show Answer

Q543) Foul smell in the water bodies of tanks, ponds ,etc, is due to Show Answer

Q544) Green house effect is due to the increased concentration of Show Answer

Q545) 5th June is celebrated as Show Answer

Q546) Effect of pollution is on Show Answer

Q547) Minamata disease is caused due to presence of ………….. in water. Show Answer

Q548) Which one of the chemical is responsible for the reduction of ozone content of the atmosphere? Show Answer

Q549) Which of the following are the harmful effect of global warming?
I. The temperature of the earth has increased by 0.6℃ is last three decades, which will lead to change in
precipitation patterns
II. This rise in temperature will lead to the increased melting of polar ice caps which will cause the rice in
sea level and many coastal areas will be submerged
III. Increased temperature will lead to increased weed growth, eruption of diseases and pests. Thus, crop
productivity will decrease Show Answer

Q550) Biochemical Oxygen Demand (BOD) is a measure of Show Answer

Q551) Which one of the following is the heavy toxic metal present in waste water from industries? Show Answer

Q552) Consider the following statements
I. Algal blooms are formed by free floating algae
II. Algal bloom causes fish mortality and deterioration of water quality
III. Water hyacinth, the world’s most problematic aquatic weed is also called ‘Terror of Bengal’
Which of the statements given above are correct about algal blooms? Show Answer

Q553) Consider the following statements about Ramesh Chandra Dagar’s work in the field of organic farming
I. Ramesh Chandra Dagar’s work includes bee-keeping, dairy management, water harvesting, composting
and agriculture in a chain of processes
II. In this process there is no need to use chemical fertilisers for crops as cattle excreta is used as manure
III. Crop waste is used for making compost which is used as natural fertilizer
IV. Compost generates natural gas which is used for energy needs of farm
Which of the statements given above are correct? Show Answer

Q554) All automobiles and fuel (petrol and diesel) were to have met the Euro III emission specification in eleven
Indian cities from 1 April 2005 and have to meet the Euro IV norms by Show Answer

Q555) In the 1990s, Delhi ranked …….. among the 41 most polluted cities in the world Show Answer

Q556) The term ‘Terror of Bengal’ is used for Show Answer

Q557) Which one is incorrect for the effects of deforestation? Show Answer

Q558) Amrita Devi Bishnoi wildlife protection award is for the individuals or communities from rural areas that
have extraordinary courage in Show Answer

Q559) Which of the following compounds are well known for biological magnification? Show Answer

Q560) Catalytic converter in vehicle is used for controlling Show Answer

Q561) Which of the following statement is correct about DDT? Show Answer

Q562) NEERI is situated in Show Answer

Q563) E-waste are buried in …A… or …B… . Complete the given statement by choosing appropriate option for A
and B Show Answer

Q564) Choose the correct statement regarding the catalytic converters Show Answer

Q565) Desertification
I. conversion of former moist and fertile land into arid desert area
II. is a product of soil erosion
III. desertified area cannot be put to any use
Which of the statements given above are correct? Show Answer

Q566) In a coal fired power plant, electrostatic precipitators are installed to control emission of Show Answer

Q567) One of the human disease due to biomagnifications of heavy metals is Show Answer

Q568) If a pond food chain gets polluted by DDT, the tissue concentration of DDT would be highest in Show Answer

Q569) Which of the following practices has caused maximum damage to the biodiversity of Indian forests? Show Answer

Q570) Which of the following problem is created by a brief exposure to extremely high sound level, 150 dB or
more generated by take off of a jet plane or rocket? Show Answer

Q571) The amount of biodegradable organic matter in sewage water can be estimated by measuring Show Answer

Q572) Deforestation brings about Show Answer

Q573) Nitrogen oxides produced from the emission of automobiles and power plants are the source of fine air
borne particles which lead to Show Answer

Q574) Acid rains are produced by excess Show Answer

Q575) In almost all Indian metropolitan cities like Delhi, the major atmospheric pollutant (s) is /are Show Answer

Q576) Increasing skin cancer and damaged DNA in living organisms results due to Show Answer

Q577) What steps should be taken before the disposal of nuclear waste? Show Answer

Q578) Polyblend is a Show Answer

Q579) Which of the following is absent in polluted water? Show Answer

Q580) The post Bhopal gas disaster analysis showed that the accident started, when the leakage of a tank started
containing Show Answer

Q581) Undesirable changes in soil profile, affecting its productivity is called Show Answer

Q582) Which of the following problem is not created by noise pollution? Show Answer

Q583) If global warming continues, the organism which may face more severe threat is Show Answer

Q584) Domestic sewage contains Show Answer

Q585) UV-rays are non-ionizing type and are lethal due to inactivation of Show Answer

Q586) Which form of UV-radiation is allowed to pass through ozone and reach the earth surface? Show Answer

Q587) Measuring Biological Oxygen Demand (BOD) is a method used for Show Answer

Q588) Which of the following are true?
I .Benzene hexachloride is a non-biodegradable pollutant
II. Anthropogenic air pollutants are natural in origin
III. Carbon monoxide is a primary air pollutant.
IV. Sulphar dioxide causes brown air effect during traffic congestion in cities Show Answer

Q589) Which of the following gases are the contributor to the greenhouse effect?
I. Carbon dioxide
II. Methane gas
III. Nitrous oxide
IV. Chlorofluorocarbon Show Answer

Q590) Deforestation refers to Show Answer

Q591) Which of the following are the main causes of air pollution?
I. Smoke from forest fires, volcanic eruptions
II. Decomposition of garbage resulting in the release of unwanted doses into the atmosphere
III. Burning of fossil fuels in automobiles and industries releases particulate and air pollutants
IV. Use of leaded petrol
V. Particulate byproducts of various industries
Which of the statements given above are correct? Show Answer

Q592) Which are the primary constituent of photochemical smog? Show Answer

Q593) It is used in refrigerator and air conditioners and it is a source of CI Show Answer

Q594) Which of the following is a major source of radioactive pollution? Show Answer

Q595) Slash and burn agriculture is called Show Answer

Q596) One green house gas contributes 14% to total global warming and another contributes 6%. There are
respectively identified as Show Answer

Q597) Fly ash is a/an Show Answer

Q598) Delhi is one of the most polluted cities of the world. Which of the following steps were taken by the
government to reduce vehicular pollution in Delhi
I. Phasing out of old vehicles
II. Use of unleaded petrol
III. Use of low sulphur petrol and diesel
IV. Use of catalytic converters in vehicles
V. Applying stringent pollution level norms for vehicles
VI. Switch over of public transport from diesel/petrol to CNG
Which of the statements given above are correct? Show Answer

Q599) The beauty of Taj Mahal is endangered due to Show Answer

Q600) Jhum cultivation
I. Also called as slash and burn agriculture, is the farming practice in North Eastern states of India
II. Farmers cut down the trees of forest and burn the plant remains
III. The ash is used as a fertilizer and the land is then used for farming or cattle grazing
IV. After cultivation, the land is left for several years, so as to allow its recovery
Which of the statements given above are correct about Jhum cultivation Show Answer

Q601) As we travels along the food chain, the concentration of DDT Show Answer

Q602) Soil erosion can be prevented by Show Answer

Q603) In India, at the beginning of the twentieth century, forests covered about …A… % of land whereas by the
end of the century, it shrunk to …B… % Show Answer

Q604) Effect of pollution is observed first on Show Answer

Q605) In India almost 40% forest have been lost in the …A… and 1% forest in the …B… region
Here A and B refers to Show Answer

Q606) Which act was formulated in the year 1974? Show Answer

Q607) Carbon monoxide causes
I. giddiness
II. headache
III. decreased vision
IV. Cardiovascular malfunction
V. asphyxia
Which of the statements given above are correct? Show Answer

Q608) Clearing of waste water in Arcata Marsh involves Show Answer

Q609) In the phosphorus cycle, weathering makes phosphate available first to Show Answer

Q610) Terracing is done in Show Answer

Q611) High amount of Escherichia coli in water indicates Show Answer

Q612) Which one of the following pairs of gases are the major cause of ‘Green house effect’? Show Answer

Q613) In plants, air pollution causes Show Answer

Q614) Recent reports of acid rains in big industrial cities are due to the effect of atmospheric pollution by Show Answer

Q615) Major cause of air pollution in big cities is Show Answer

Q616) Which one of the following statement is wrong in case Bhopal gas tragedy? Show Answer

Q617) Why ozone is known as ‘chemical weed’? Show Answer

Q618) Consider the following statements
I. Noise causes psychological disorder in humans
II. Noise causes physiological disorder in humans
III. Noise measurable unit is dB but some times it is measured in Dobson unit
IV. 150 dB is tolerate for human
Which of the above statements are true? Show Answer

Q619) Which of the following gases does not cause acid rain? Show Answer

Q620) Electrostatic Precipitator (ESP)
I. Is an electrical device to remove particulate matter present in the exhaust of thermal power plant
II. More than 99% particulate matter can be removed by this method
III. ESP has electrode wires and a stage of collecting plates
Which of the statements given above are correct? Show Answer

Q621) The pollutants which are already present in nature, but are released in substantial amounts by man are
known as Show Answer

Q622) One of the chief causative factor of desertification is Show Answer

Q623) The national forest policy of India has recommended …A… % forest cover for the plains and …B… % for the
hills Show Answer

Q624) Hydrogen sulphide causes Show Answer

Q625) Which of the following statements regarding decomposition is false? Show Answer

Q626) Ozone layer is being destroyed by Show Answer

Q627) Consider the following statement about polyblend
I. In 1998, Ahmed Khan developed polyblend, a fine powder of recycled modified plastic
II. Polyblend has been mixed with bitumen to lay roads in Bengaluru
III. Polyblend enhances bitumen’s water repellant properties and helps to increase the life of road
Which of the statements given above are correct? Show Answer

Q628) Chipko movement
I. It is movement initially meant for protecting trees but now meant for preservation of environment
including habitat and wildlife
II. Chipko movement was started in Garhwal, Himalayas in 1973 Shri Sundar Lal Bahuguna to prevent
cutting down of trees
III. Local women hugged trees to prevent their cutting by the contractor
Which of the statements given above are correct? Show Answer

Q629) Biochemical Oxygen Demand (BOD) in a river water Show Answer

Q630) Due to attack of fumes of sulphur dioxide and sulphuric acid, the marble of Taj Mahal and Red stone of Red
fort changed into calcium sulphate which causes Show Answer

Q631) Which of the following is not a device used to control a particulate matter? Show Answer

Q632) What was the aim of Chipko movement? Show Answer

Q633) According to central Pollution Control Board (CPCB), which particulate size in diameter (in micrometres)
of the air pollutants is responsible for greatest harm to human health? Show Answer

Q634) Lichens are described as indicator of Show Answer

Q635) The two gases making highest relative contribution to the green house gases are Show Answer

Q636) Which of the chemical reaction is not correct? Show Answer

Q637) Term used for accumulation of non-degradable pollutant in higher trophic level is Show Answer

Q638) Domestic sewage mainly contains …A… wastes which are readily decomposed with the help of …B… . Here
A and B refers to Show Answer

Q639) Which insecticide is more hazardous to human health? Show Answer

Q640) Which of the following statement is/are not correct regarding biomagnification?
I. Heavy metals and persistent pesticides pass into food chain and increases in amount per unit weight of
organisms with the rise in trophic level due to their accumulation in fat
II. Accumulation of zinc can cause thinning of eggshell in birds
III. DDT accumulation is a major cause of killing of fish-eating birds
IV. Biomagnification occurs only in marine food chain Show Answer

Q641) In which one of the following, the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent
(DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order? Show Answer

Q642) Decibel (dB) is a standard abbreviation used for the quantitative expression of Show Answer

Q643) Which of the following is not shortwave radiation? Show Answer

Q644) Euro II norms were stipulated to control Show Answer

Q645) Statement 1: Major cause of ozone depletion is CFCs but greenhouse gases is also affecting negatively
Statement 2: Greenhouse gases increase, the temperature of troposphere but decreases the
temperature of stratosphere which facilitate the ozone depletion Show Answer

Q646) Statement 1: Methane component of greenhouse gases contributing to global warming is about 20%
Statement 2: Introduction of multi-point fuel injection engines in automobiles has decreased methane
content in the exhausts Show Answer

Q647) Statement 1: UV radiation causes photo-dissociation of ozone into O2 and O, thus causing damage to
the stratospheric ozone layer
Statement 2: Ozone hole is resulting in global warming and climate change Show Answer

Q648) Statement 1: Deforestation is one main factor contributing to global warming.
Statement 2: Besides CO2, two other gases methane and CFCs are included under green house gases. Show Answer

Q649) Statement 1: Ozone layer present in the stratosphere protects the living organisms from harmful UV
rays coming from sun by absorbing nearly all of them
Statement 2: Ozone formed in the troposphere by photochemical reactions as a result of human
activities is harmful for all living organism Show Answer

Q650) Statement 1: Agricultural output increased several times after introduction of DDT.
Statement 2: DDT was the first insecticide used on a wide scale. Show Answer

Q651) Statement 1: Inhabitants close to very busy airports are likely to experience health hazards
Statement 2: Sound level of jet aeroplanes usually exceeds 160 dB Show Answer

Q652) Statement 1: Presently, the global atmosphere is warming up.
Statement 2: The depletion of stratospheric ozone layer has resulted in increase in ultraviolet
radiations reaching the earth Show Answer

Q653) Statement 1: Methane component of green house gases contributing to global warming is about 20 per
cent
Statement 2: Introduction of multi-point fuel injection engines in automobiles has decreased methane
content in the exhausts Show Answer

Q654) Statement 1: A suspended particulate matter (SPM) is an important pollutant released by diesel
vehicles.
Statement 2: Catalytic converters greatly reduce pollution caused by automobiles. Show Answer

Q655) BOD increased by Show Answer

Q656) Which of the following is not as a consequence of global warming? Show Answer