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


Q11) The presence of ozone in the atmosphere of earth: Show Answer


Q12) What will happen if our water resources are continued to be polluted by industrial wastes? Show Answer


Q13) In Bhopal gas tragedy, the gas released was: Show Answer


Q14) Aerosols are: Show Answer


Q15) The "solution to pollution is dilution." This can be best correlated to: Show Answer


Q16) Which of the following pollutants is not produced by exhaust of motor vehicles? Show Answer


Q17) Most outstanding danger at present for the survival of living beings on the earth is: Show Answer


Q18) Radiation is health hazard because it causes: Show Answer


Q19) In which industry, workers suffer from Byssinosis? Show Answer


Q20) Spraying of DDT on crops produces pollution of: Show Answer


Q21) The most widely existing pollutant in the air is: Show Answer


Q22) If water pollution continues at its present rate, it will eventually: Show Answer


Q23) Which of the following air pollutants is the chief cause of acid rains? Show Answer


Q24) Which part of human body is first to be affected by nuclear radiations? Show Answer


Q25) Opuntia was a menace a few decades back in India. It was almost eradicated by: Show Answer


Q26) Photochemical smog is caused by formation of: Show Answer


Q27) Non-biodegradable toxic pollutants, as they pass through food webs, undergo biological: Show Answer


Q28) WHO's recommendations about the industrial noise limit is of: Show Answer


Q29) Contamination with radioactivity is dangerous because it causes: Show Answer


Q30) A pollutant is any substance, chemical or other factor, that changes: Show Answer


Q31) The molecular action of ultraviolet light is mainly reflected through: Show Answer


Q32) In big cities automobiles are responsible for air pollution: Show Answer


Q33) An important source of aerosol in upper atmosphere is: Show Answer


Q34) Enriched air, if inhaled for long time, causes: Show Answer


Q35) In a small town, pasture is contaminated with air borne fluorides, Grazing animals of that area will suffer from: Show Answer


Q36) Strengthening of concept of environmental monitoring is due to concern for the: Show Answer


Q37) Biomagnification is a process of: Show Answer


Q38) Environmental monitoring helps in all except in: Show Answer


Q39) Automobiles discharge hydrocarbons and nitrous oxide in atmosphere which is further converted to: Show Answer


Q40) Air pollution is highest in: Show Answer


Q41) Now-a-days DDT is not effective for killing mosquitoes because: Show Answer


Q42) Certain epiphytic lichens indicate changing levels of atmospheric pollution, specially of: Show Answer


Q43) Ozone layer is chiefly disturbed by: Show Answer


Q44) Carbon monoxide is a very harmful pollutant because it: Show Answer


Q45) B. O. D. of a river was found to be very low, this means water: Show Answer


Q46) Nuclear power generates: Show Answer


Q47) Many organic substances or organisms help in clearing the water when found in: Show Answer


Q48) When pollution load is more in the lakes there cannot take place self-purification because: Show Answer


Q49) The level of tolerance of DDT is 10 ppm in case of Daphnia, therefore Daphnia: Show Answer


Q50) Better method of pest control is: Show Answer


Q51) The pollutants emitted by jet aeroplances in outer atmosphere as fluorocarbons are known as: Show Answer


Q52) The chemical which causes damage to WBC, bone marrow, spleen, lymph, nodes and lungs is: Show Answer


Q53) Nuclear explosion causes mainly: Show Answer


Q54) UV radiations to disinfect polluted water is not generally recommended because: Show Answer


Q55) UV radiations from sunlight cause the reaction that produce: Show Answer


Q56) Which of the following is the main factor of water pollution? Show Answer


Q57) Activated sludge is associated with management of waste and it is a kind of: Show Answer


Q58) Term 'nuclear winter' is associated with: Show Answer


Q59) Ozone layer in upper atmosphere is destroyed by: Show Answer


Q60) The most dangerous radioactive air pollutant is: Show Answer


Q61) Acid rain is caused by: Show Answer


Q62) Which of the following is a qualitative pollutant? Show Answer


Q63) DDT is a/an: Show Answer


Q64) Decomposition of domestic wastes under natural processes is known as: Show Answer


Q65) Which of the following causes fibrosis in lungs? Show Answer


Q66) Which of the following is secondary pollutant? Show Answer


Q67) The air pollution at source can be controlled by: Show Answer


Q68) Biochemical oxygen demand means: Show Answer


Q69) Hot water contains dissolved oxygen and then the BOD: Show Answer


Q70) The gas which is produced in rice paddy and is associated with global warming is: Show Answer


Q71) The newspaper contains one of the following toxic material. It is: Show Answer


Q72) The nitrifying bacteria are: Show Answer


Q73) Photochemical smog is related to the pollution of: Show Answer


Q74) Most important causative pollutant of soil may be: Show Answer


Q75) Greenhouse effect is enhanced in the environment by the gas: Show Answer


Q76) Most hazardous metal pollutant of automobile exhaust is: Show Answer


Q77) Which susbtance provides protection from carcinogens? Show Answer


Q78) Which is the main cause for desertification? Show Answer


Q79) Taj Mahal is threatened due to the effect of: Show Answer


Q80) When huge amount of sewage is dumped into a river, the BOD will: Show Answer


Q81) Depleting of ozone umbrella is due to: Show Answer


Q82) The American aquatic weed, which has become a trouble in India is? Show Answer


Q83) Which of the following causes "Greenhouse effect"? Show Answer


Q84) NEERI is: Show Answer


Q85) As it passes into food chain, the concentration of DDT: Show Answer


Q86) Carbon monoxide kills because it destroys: Show Answer


Q87) DDT concentration recorded in human body has been: Show Answer


Q88) Lead is considered mainly: Show Answer


Q89) Which one of the following is not pollutant? Show Answer


Q90) A person has impaired nervous system and signs of madness due to continued intake of metal contaminated water. The metal is: Show Answer


Q91) What is the intensity of sound in normal conversation? Show Answer


Q92) Reason of lung cancer is: Show Answer


Q93) The result of Ozone hole is: Show Answer


Q94) Ozone hole means: Show Answer


Q95) Ganga Action plan was started in: Show Answer


Q96) Fluoride pollution mainly affects: Show Answer


Q97) BOD is a measure of: Show Answer


Q98) Frequent occurrence of water blooms in a lake indicates which of the following? Show Answer


Q99) A range of loudness of sound of 70-90 decibels is rated as: Show Answer


Q100) Expand BOD: Show Answer


Q101) The term ' Bio-magnification' refers to the: Show Answer


Q102) This acts as bioindicator of air pollution: Show Answer


Q103) 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


Q104) A lake with an inflow of domestic sewage rich in organic waste, may result in: Show Answer


Q105) The noise produced in office is normally at the level of: Show Answer


Q106) Photosynthetic Active Radiation (PAR) has the following range of wavelengths: Show Answer


Q107) Which of the following is not used for disinfection of drinking water? Show Answer


Q108) Identify the correctly matched pair: Show Answer


Q109) Formation of non-functional methaemoglobin causes blue-baby syndrome. This is due to: Show Answer


Q110) Which one of the following statement pertaining to pollutants is correct? Show Answer


Q111) Examples of regional pollutions are: Show Answer


Q112) Greenhouse effect is due to: Show Answer


Q113) Greenhouse effect is the cumulative result of the influences of certain gases. Identify the gas which is not involved in this influence: Show Answer


Q114) Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities passed in the year: Show Answer


Q115) Photochemical smog pollution does not contain: Show Answer


Q116) Which of the following strategy is not a correct approach to reduce global warming? Show Answer


Q117) Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by: Show Answer


Q118) The Montreal protocol refers to: Show Answer


Q119) Which one of the following is an environment-related disorder with the correct main cause? Show Answer


Q120) In a coal fired power plant electrostatic precipitators are installed to control emission of: Show Answer


Q121) Which one of the following is not a bioindicator of water pollution? Show Answer


Q122) Increase of BOD in water leads to: Show Answer


Q123) Mercury pollution causes: Show Answer


Q124) 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


Q125) Eutrophication is often seen in: Show Answer


Q126) Which one of the following organisms is used as indicator of water quality? Show Answer


Q127) 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


Q128) Atmosphere absorbs maximum amount of: Show Answer


Q129) Water pollution: Show Answer


Q130) The noise pollution is measured in: Show Answer


Q131) Which of the following radiations is non-ionising and has more specific biological effect than others: Show Answer


Q132) Symptoms such as headache, ulcers, high blood pressure, fatigue and nausea are due to: Show Answer


Q133) Electrostatic precipitator is for: Show Answer


Q134) Lichens are indicators of: Show Answer


Q135) Radiation pollution can be controlled by: Show Answer


Q136) Symptoms of radiation are: Show Answer


Q137) Polluted water will most commonly contain: Show Answer


Q138) In contrast to tap water, BOD of pond water which is polluted by sewage waste will have: Show Answer


Q139) The most dangerous metal pollutant of automobile exhaust is: Show Answer


Q140) The major contributor of Greenhouse gases to the atmosphere is: Show Answer


Q141) Sewage drained into water bodies kill fishes because: Show Answer


Q142) In an aquatic food chain polluted by DDT, the tissue concentration of DDT would be highest in Show Answer


Q143) Algal bloom is caused by Show Answer


Q144) Increase skin cancer and high mutation rate are the result of Show Answer


Q145) Two lakes A & B are identical in all aspects except that lake A has higher temperature. Which of the following is true? Show Answer


Q146) In Effluent Treatment Plants (ETPs) at which stage micro-organism treatment in provided? Show Answer


Q147) In treatment of waste water biological treatment is Show Answer


Q148) Which is non-degradable pollutant? Show Answer


Q149) Which of the following is a natural pollutant? Show Answer


Q150) As the organic waste input in a water body increases Show Answer


Q151) Pick out the correct choice from the following Show Answer


Q152) What are the organisms that can tolerate high degrees of pollution called as? Show Answer


Q153) The process of nutrient enrichment of water is called as ________. Show Answer


Q154) When and where the Ozone hole was discovered? Show Answer


Q155) The Earth Summit, 1992, was held at Show Answer


Q156) In India, Jhum cultivation is practiced mainly in Show Answer


Q157) Thickness of ozone is measured in Show Answer


Q158) Green muffler is used against which type of pollution? Show Answer


Q159) 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


Q160) Which of the following is correct about "El Nino effect"? Show Answer


Q161) 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


Q162) In India, the Air (Prevention and Control of Pollution) Act came into force in 1981 but was amended in 1987 to include Show Answer


Q163) The effect of today's radioactive fall out will be harmful to children of future generation than to children of present because Show Answer


Q164) When domestic sewage mixes with river water Show Answer


Q165) ______ are used in electrostatic precipitators Show Answer


Q166) Biological oxygen demand of _______ is the least. Show Answer


Q167) Due to eutrophication _______. Show Answer


Q168) _____ is the first step of sewage treatment. Show Answer


Q169) We and our surroundings together are called Show Answer


Q170) Which of the following is not an environmental problem? Show Answer


Q171) Volcano is _______ source of pollution. Show Answer


Q172) Which method is used for the removal of sulphur dioxide and ammonia from the polluted air? Show Answer


Q173) BOD is _______ in polluted water and _______ in potable water. Show Answer


Q174) Which pollutants are responsible for bronchitis? Show Answer


Q175) Which method is used to control pollutants of particulate nature? Show Answer


Q176) Which of the following figures shows correct relative contribution of greenhouse gases to global warming? Show Answer


Q177) 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


Q178) Primary pollutants used in the synthesis of photochemical smog are Show Answer


Q179) DDT -
A. is a non-degradable pollutant
B. shows bio-magnification
C. is harmful to fishes and birds
D. is a pesticide Show Answer


Q180) 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


Q181) 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


Q182) There are working, 'EcoSan' toilets in many areas of Show Answer


Q183) Which statement is false? Show Answer


Q184) DDT causes Show Answer


Q185) 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


Q186) 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


Q187) The most widely used method for removing particulate matter is not associated with which of the following? Show Answer


Q188) 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


Q189) Cleaning of waste water in Arcata Marsh involves Show Answer


Q190) Eco-san toilets are not associated with which of the following? Show Answer


Q191) Choose the correct sequence of greenhouse gases with respect to their relative contribution to global warming in increasing order Show Answer


Q192) Choose the odd one our w.r.t. ozone depletion in the stratosphere Show Answer


Q193) Bio-magnification refers to increase in concentration of the toxicant at successive trophic levels, this happens because Show Answer


Q194) 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


Q195) How much of the e-wastes generated in the developed world are exported to developing countries Show Answer


Q196) The world summit on sustainable development held in 2002 in _____, _____ countries pledged their commitment to achieve by 2010. Show Answer


Q197) As the exhaust passes through the catalytic converter Show Answer


Q198) Photochemical smog differs from classical/London smog in Show Answer


Q199) An international initiative taken in _______ to mitigate climate change and to reduce greenhouse emission is called _______. Show Answer


Q200) The thickness of ozone over poles changes with the season being lowest in Show Answer


Q201) 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


Q202) Amrita Devi Bishnoi Wildlife protection Award is given to the individuals or communities from Show Answer


Q203) The Ozone hole over Antarctica develops each year between Show Answer


Q204) 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


Q205) Heavy metals defined as elements with density ________ are harmful to ecological systems. Show Answer


Q206) 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


Q207) Which of the following is not one of the major environment problems resulting from human interference in the nitrogen cycle? Show Answer


Q208) 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


Q209) Which of the following is not a greenhouse gas? Show Answer


Q210) 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


Q211) The device on an automobile that filters harmful pollutants out of the exhaust before it enters the air is a(n) _______. Show Answer


Q212) What did Chernobyl, Three Mile Island, the Love Canal, and Bhopal, India all have in common? Show Answer


Q213) What contributes the most to acid rain? Show Answer


Q214) Temperature inversions, heat islands, and dust domes are the result of ______. Show Answer


Q215) The thickness of ozone in the column of air from the ground to top of the atmosphere is measured in terms of Show Answer


Q216) The phenomenon where cool, dense air sits under a layer of lighter warmer air is known as a _______. Show Answer


Q217) Which one is incorrect? Show Answer


Q218) The addition of sewage and other organic material into a water supply _______. Show Answer


Q219) The ozone in the earth's atmosphere screens out Show Answer


Q220) What part of the atmosphere contains the ozone layer? i.e. where is most of the ozone? Show Answer


Q221) 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


Q222) You can protect yourself from too much exposure to UV radiation by taking two of the following precautions. Which two? Show Answer


Q223) 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


Q224) The single best way to reduce acid deposition would be to Show Answer


Q225) Which of the following contributes to both global warming and ozone thinning? Show Answer


Q226) Which part of the CFC molecule attacks ozone? Show Answer


Q227) 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


Q228) Since the Montreal Protocol was signed Show Answer


Q229) Cultural or Accelerated Eutrophication lakes is most often caused by input of Show Answer


Q230) Secondary sewage treatment Show Answer


Q231) Which of the following is considered the greatest problem associated with the use of pesticides? Show Answer


Q232) 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


Q233) 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


Q234) 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


Q235) Pollution of big cities can be controlled to large extent by Show Answer


Q236) Among the following environmental pollutants which has the problem of bio-magnification Show Answer


Q237) UV radiation is injurious to plants because it Show Answer


Q238) 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


Q239) "Good ozone" is found in the Show Answer


Q240) Which of the following is a chlorofluocarbon? Show Answer


Q241) Mass of living matter at a trophic level in an area at any time is called? Show Answer


Q242) Which one of the following expanded forms of the following acronyms is correct? Show Answer


Q243) The domestic sewage in large cities Show Answer


Q244) If a water body is contaminated with a toxicant, its bio-magnification will be more marked in Show Answer


Q245) Environment Protection Act, to protect and improve the quality of our environmental air, water and soil was passed in the year Show Answer


Q246) In domestic sewage, impurities in the form of suspended solids, colloidal material and dissolved materials, are about Show Answer


Q247) 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


Q248) In an area where DDT has been used extensively, the population of birds declined significantly because Show Answer


Q249) Which one of the following is a wrong statement? Show Answer


Q250) Measuring Biochemical Oxygen Demand (BOD) is a method used for Show Answer


Q251) Which of the following statements regarding the greenhouse effect has the lowest degree of certainty? Show Answer


Q252) Which of the following air pollutants has shown the greatest decline in recent years? Show Answer


Q253) Bhopal gas tragedy of 1984 took place because methyl isocyanate reacted with Show Answer


Q254) 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


Q255) The ideal modern sewage system is one in which Show Answer


Q256) The term activated sludge is used for a common secondary treatment technique because Show Answer


Q257) Global warming can be controlled by Show Answer


Q258) The Air Prevention and Control of Pollution Act came into force in Show Answer


Q259) Kyoto Protocol was endorsed at Show Answer


Q260) A citizen group called Friends of the Arcata Marsh (FOAM) basically belongs to Show Answer


Q261) Warm ocean surge of Peru current that recurs after 5-8 years in East Pacific along South America is Show Answer


Q262) A location with luxuriant growth of lichens on the trees indicates that the Show Answer


Q263) The zone of atmosphere in which the ozone layer is present is called Show Answer


Q264) A scrubber in the exhaust of a chemical industrial plant removes Show Answer


Q265) Main cause of Eutrophication is Show Answer


Q266) Which of the following is true for eutrophicated water body? Show Answer


Q267) If there was no carbon dioxide in the earth's atmosphere, the temperature of the earth surface would be Show Answer


Q268) The prime contaminants in lakes eutrophied by sewage and agricultural wastes are Show Answer


Q269) The process of nutrient enrichment of water, and subsequent loss of species diversity is referred to as Show Answer


Q270) What percentage of impurities make domestic sewage unfit for human use? Show Answer


Q271) 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


Q272) The second commitment period of Kyoto Protocol was extended from Show Answer


Q273) 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


Q274) The polluting strength of sewage is usually characterized by its. Show Answer


Q275) Which of the following would most likely help to slow down the greenhouse effect? Show Answer


Q276) Wildlife Protection Act India was implemented in the year Show Answer


Q277) Which one of the following combinations is wrong? Show Answer


Q278) Relationship between DO an BOD is that they Show Answer


Q279) 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


Q280) Select the non-degradable pollutant(s) from the following.
I. Plastic
II. Organochloride pesticides
III. Heavy metals
IV. Domestic sewage Show Answer


Q281) Now-a-days, use of DDT as insecticide is banned because Show Answer


Q282) Rachel Carson's famous book "Silent Spring" is related to Show Answer


Q283) 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


Q284) High value of BOD (Biochemical Oxygen Demand) indicates that Show Answer


Q285) Acid rain is caused by increase in the atmospheric concentration of Show Answer


Q286) Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of Show Answer


Q287) The UN conference of Parties on climate change in the year 2012 was held at Show Answer


Q288) Increase in concentration of the toxicant at successive trophic levels is known as Show Answer


Q289) Recently Paris held a CoP summit, which CoP summit was this? Show Answer


Q290) Joint Forest Management Concept was introduced in India during Show Answer


Q291) A river with an inflow of domestic sewage rich in organic waste may result in Show Answer


Q292) Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers Show Answer


Q293) A lake which is rich in organic waste may result in Show Answer


Q294) The highest DDT concentration in aquatic food chain shall occur in Show Answer


Q295) Phenomenon involved in increasing the concentration of non-degradable pollutants in a trophic level of an ecosystem is called Show Answer


Q296) 'Ozone layer' is located in Show Answer


Q297) Which of the following combination is wrong? Show Answer


Q298) Which of the following binds with haemoglobin irreversibly? Show Answer


Q299) Black-foot disease is caused due to polluation of ground water as a consequence of increased seepage of Show Answer


Q300) Catalytic converters are fitted into automobiles to reduce the emission of harmful gases. Catalytic
converters changes unburnt hydrocarbons into Show Answer


Q301) Which one of following is not an air pollutant? Show Answer


Q302) DDT residues are rapidly passed through food chain causing biomagnifications because DDT is Show Answer


Q303) Rain is called acid rain when its pH is below Show Answer


Q304) CFCs are responsible for Show Answer


Q305) Acid rain is due to Show Answer


Q306) Noise is Show Answer


Q307) 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


Q308) Polyblend is mixed with …A… to lay roads in …B… . Complete the given statement by choosing appropriate
option for A and B Show Answer


Q309) Which one of the following is mainly responsible for green houses effect? Show Answer


Q310) 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


Q311) 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


Q312) Which method is used to remove particulate matter present in exhaust of thermal power plant? Show Answer


Q313) 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


Q314) 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


Q315) Green house gases are Show Answer


Q316) In which state of India, Ecosave toilets are not found? Show Answer


Q317) Identify the correctly matched pair. Show Answer


Q318) The main cause of pollution is metrocities is Show Answer


Q319) 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


Q320) Which one of the following is a most efficient device to eliminate particulate matters from the industrial
emissions? Show Answer


Q321) Kyoto protocol is related with Show Answer


Q322) …….. is an undesirable change in physical, chemical or biological characteristics of air, land, water or soil Show Answer


Q323) Desertification has become a major problem due to Show Answer


Q324) 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


Q325) Eutrophicated lake has BOD Show Answer


Q326) 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


Q327) 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


Q328) Photochemical smog formed in congested metropolitan cities mainly consist of Show Answer


Q329) If there is no greenhouse effect, the average temperature at the surface of earth would have been Show Answer


Q330) The cause of decline in the population of reptiles and birds is Show Answer


Q331) 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


Q332) Increase in concentration of a toxicant at successive trophic levels is called Show Answer


Q333) 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


Q334) Secondary sewage treatment is mainly a Show Answer


Q335) Which of the following diseases is related to cadmium pollution? Show Answer


Q336) Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This occurs due
to disturbed Show Answer


Q337) 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


Q338) Study the following statements regarding Ecosave toilet and select the incorrect ones Show Answer


Q339) The atmosphere around earth is warmed because Show Answer


Q340) Earth’s climate Show Answer


Q341) Jhum cultivation refers to Show Answer


Q342) Which of the following is not a green house gas? Show Answer


Q343) In an area where DDT had been used extensively, the population of birds declined significantly because Show Answer


Q344) The concept of Joint Forest Management (JFM) involves Show Answer


Q345) According to Kyoto protocol, the major nations abide to reduce concentration of green –house gases by Show Answer


Q346) This pollutant causes burning sensation of throat and eyes and vomiting sensation Show Answer


Q347) Drinking of mineral water with very low level of pesticides (about 0.02 ppm) for long periods may Show Answer


Q348) The major goal of the green revolution was to Show Answer


Q349) In scrubber, the exhaust is passed through a Show Answer


Q350) During day time, sound level is silent zone is Show Answer


Q351) The unfavorable alteration of environment due to human activities is termed as Show Answer


Q352) Which one of the following is a correct option with reference to pathogenic bacteria and DDT? Show Answer


Q353) Expanded from of BOD is Show Answer


Q354) Relative Biological Effectiveness (RBE) usually refers to the damage caused by Show Answer


Q355) The possible beneficial aspect of grazing animals is the Show Answer


Q356) Ozone hole results in Show Answer


Q357) 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


Q358) 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


Q359) The main component of photochemical smog is Show Answer


Q360) The soil pollutants that affect the food chain and food web by killing microorganisms and plants are Show Answer


Q361) In acid rain, SO2 accounts by Show Answer


Q362) According to the Central Pollution Control Board (CPCB), particles that are responsible for causing great
harm to human health are of diameter Show Answer


Q363) 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


Q364) BOD is concerned with Show Answer


Q365) 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


Q366) Cutting of trees in a forest is called Show Answer


Q367) Which one of the following is a major pollutant of automobile gases? Show Answer


Q368) Which of the following are the example of industrial solid wastes? Show Answer


Q369) World most problematic aquatic weed is Show Answer


Q370) Solid waste can be Show Answer


Q371) Addition of phosphate and nitrates/fertiliser into water and that water ultimately draining into lake firstly
affects
Show Answer


Q372) Biomagnification is highest in Show Answer


Q373) Polyblend Show Answer


Q374) The ozone layer is found in Show Answer


Q375) Which of the following health problem originates due to the inhalation of fine particulate matter? Show Answer


Q376) Irreparable computers and other electronic goods are known as Show Answer


Q377) Eutrophication is excessive growth of algae, plants and animals in water-bodies due to nutrient
enrichment particularly with Show Answer


Q378) Peeling of ozone umbrella, which protects us from UV rays, is caused by Show Answer


Q379) Chipko movement was started in Garhwal, Himalayas in Show Answer


Q380) Ultraviolet radiations from sunlight causes a reaction that produces Show Answer


Q381) Ozone hole is largest over Show Answer


Q382) Ozone depletion is occurring widely in Show Answer


Q383) Chipko movement was successfully launched by Show Answer


Q384) Stirred-tank bioreactors have been designed for Show Answer


Q385) What did Chernobyl, Three Mile Island, the Love Canal and Bhopal, India all have in common? Show Answer


Q386) Which of the following statement pertaining to pollutants is correct? Show Answer


Q387) Which of the following are the indicators of pollution? Show Answer


Q388) To remove which pollutants, enzymatic filters are used? Show Answer


Q389) What is the major cause of desertification? Show Answer


Q390) ESP is to arrest Show Answer


Q391) Reforestation is useful for Show Answer


Q392) Which of the following metals is a water pollutant and causes sterility in human being? Show Answer


Q393) 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


Q394) Eutrophication is caused by Show Answer


Q395) Examples of regional pollution are Show Answer


Q396) World Summit on Sustainable Development (2002) was held in Show Answer


Q397) Which statement represents the harmful effect of depletion of earth’s ozone layer? Show Answer


Q398) Which of the following statement is not correct? Show Answer


Q399) 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


Q400) World environment day is celebrated on Show Answer


Q401) A lake with nutrients is called Show Answer


Q402) Three mile island and chernobyl disasters are associated with accidental leakage of Show Answer


Q403) Ozone is spread in the swimming pool because Show Answer


Q404) 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


Q405) Checking of re-radiating heat by atmospheric dust O3, CO2and water vapours is Show Answer


Q406) Of the following four metropolitan Indian cities, where polluted air hangs above like a cloud is Show Answer


Q407) 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


Q408) 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


Q409) Irrepairable goods, computers and other electronic devices are known as Show Answer


Q410) 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


Q411) Scrubber is used to remove gases like Show Answer


Q412) 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


Q413) 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


Q414) Cigarette smoking causes Show Answer


Q415) Ozone saves the biosphere by absorbing the high energy radiation called Show Answer


Q416) The fertile top soil is removed by human activities like Show Answer


Q417) Which of the following statement is correct? Show Answer


Q418) Algal blooms imparts a distinct colour to water due to Show Answer


Q419) Pollution is not caused by Show Answer


Q420) The term ‘biomagnification’ refers to the Show Answer


Q421) Carbon dioxide is called green house gas because it is Show Answer


Q422) One of the following acts as secondary pollutant Show Answer


Q423) Which of the following toxic materials was present in Minamata bay of Japan? Show Answer


Q424) Global agreement in specific control strategies to reduce the release of ozone depleting substances, was
adopted by Show Answer


Q425) Ecological sanitation is a sustainable system for handling human excreta, using dry composting toilets.
Such ‘Ecosave’ toilets are working in Show Answer


Q426) Common indicator organism of water pollution is Show Answer


Q427) Kyoto protocol has specified the commitments of different countries Show Answer


Q428) Which of the following groups of gases cause photochemical smog? Show Answer


Q429) The phenomenon by which certain pollutants (e.g., DDT, Mercury) accumulates in the body tissues in
increasing concentration is called Show Answer


Q430) 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


Q431) In India, the heaviest demand of forests is for Show Answer


Q432) The ultraviolet radiations in the stratosphere are absorbed by Show Answer


Q433) Carbon monoxide is a pollutant because it Show Answer


Q434) 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


Q435) In big cities, the major atmospheric pollutant is Show Answer


Q436) Steps taken by the Government of India to control air pollution include Show Answer


Q437) Which of the following plants is used for the purification of water? Show Answer


Q438) Which of the following is non-biodegradable? Show Answer


Q439) Which one among the following is likely to have the highest level of DDT deposition in its body? Show Answer


Q440) ‘Bad’ ozone is formed in Show Answer


Q441) 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


Q442) Green-house effect refers to Show Answer


Q443) 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


Q444) A pollutant can best defined as it Show Answer


Q445) 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


Q446) What is true about the Euro II norms? Show Answer


Q447) Montreal protocol, which calls for appropriate action to protect the ozone layer from human activities was
passed in the year Show Answer


Q448) 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


Q449) Excess atmospheric CO2 increase green house effect as CO2 Show Answer


Q450) Removal of forest areas to fulfil the needs of growing human population is called Show Answer


Q451) Which of the following is a secondary air pollution? Show Answer


Q452) Maximum green house gases are released by Show Answer


Q453) In 2002 AD, according to research, the concentration of CFCsreached to Show Answer


Q454) 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


Q455) Which Act was formulated in the year 1986? Show Answer


Q456) Which one of the following pairs is mismatched? Show Answer


Q457) Good ozone is formed in Show Answer


Q458) Ozone layer is depleted by Show Answer


Q459) 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


Q460) El Nino effect is closely associated with Show Answer


Q461) One of the main reasons of soil erosion in India is Show Answer


Q462) Maximum noise permissible during day time in residential areas is Show Answer


Q463) When the noise was recognized as an air pollutant? Show Answer


Q464) 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


Q465) An international treaty, Montreal Protocol in 1987 to curb the emission of ozone depleting substances, was
held at Show Answer


Q466) The natural phenomenon of keeping earthworm due to presence of certain gases in the atmosphere is
called Show Answer


Q467) Rise in temperature leads to deleterious changes in environment resulting in odd climatic changes called Show Answer


Q468) A lake with an inflow of domestic sewage rich in organic waste may result in Show Answer


Q469) Acid rain is mainly caused due to increase in the levels of the gas(es) Show Answer


Q470) Nutrient enrichment of a lake will cause Show Answer


Q471) Sound becomes a hazardous noise pollution if its level exceeds Show Answer


Q472) Old pollutant amongst the following is Show Answer


Q473) What is soil erosion? Show Answer


Q474) Ozone depletion in stratosphere shall result in Show Answer


Q475) The oxygen concentration at the floor of the deep ponds and lakes is very low because of the Show Answer


Q476) Which of the following is not an air pollutant? Show Answer


Q477) Montreal protocol aims at Show Answer


Q478) Sulphur dioxide causes Show Answer


Q479) 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


Q480) Organic farming is the technique of raising crops through the use of Show Answer


Q481) Loss of forest, urbanization, increasing pollution are all due to Show Answer


Q482) Motor vehicles equipped with catalytic converter should use unleaded petrol because lead Show Answer


Q483) The accelerated ageing of lakes due to sewage and agricultural and industrial waste is called Show Answer


Q484) Which of the following is biodegradable pollutant? Show Answer


Q485) Eutrophication results in reduction of Show Answer


Q486) Which one of the following gases can deplete ozone layer in the upper atmosphere? Show Answer


Q487) 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


Q488) In the treatment of waste water discharge, which treatment stage involves biological treatment? Show Answer


Q489) Increase in toxic concentration from one trophic level to another trophic level is called Show Answer


Q490) 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


Q491) Which of the following strategies is not a correct approach to reduce global warming? Show Answer


Q492) 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


Q493) Gaseous pollutants can be controlled by Show Answer


Q494) CFCs are not recommended to be used in refrigerators because they Show Answer


Q495) Green house effect with respect to global climate refers to Show Answer


Q496) Foul smell in the water bodies of tanks, ponds ,etc, is due to Show Answer


Q497) Green house effect is due to the increased concentration of Show Answer


Q498) 5th June is celebrated as Show Answer


Q499) Effect of pollution is on Show Answer


Q500) Minamata disease is caused due to presence of ………….. in water. Show Answer


Q501) Which one of the chemical is responsible for the reduction of ozone content of the atmosphere? Show Answer


Q502) 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


Q503) Biochemical Oxygen Demand (BOD) is a measure of Show Answer


Q504) Which one of the following is the heavy toxic metal present in waste water from industries? Show Answer


Q505) 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


Q506) 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


Q507) 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


Q508) In the 1990s, Delhi ranked …….. among the 41 most polluted cities in the world Show Answer


Q509) The term ‘Terror of Bengal’ is used for Show Answer


Q510) Which one is incorrect for the effects of deforestation? Show Answer


Q511) Amrita Devi Bishnoi wildlife protection award is for the individuals or communities from rural areas that
have extraordinary courage in Show Answer


Q512) Which of the following compounds are well known for biological magnification? Show Answer


Q513) Catalytic converter in vehicle is used for controlling Show Answer


Q514) Which of the following statement is correct about DDT? Show Answer


Q515) NEERI is situated in Show Answer


Q516) E-waste are buried in …A… or …B… . Complete the given statement by choosing appropriate option for A
and B Show Answer


Q517) Choose the correct statement regarding the catalytic converters Show Answer


Q518) 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


Q519) In a coal fired power plant, electrostatic precipitators are installed to control emission of Show Answer


Q520) One of the human disease due to biomagnifications of heavy metals is Show Answer


Q521) If a pond food chain gets polluted by DDT, the tissue concentration of DDT would be highest in Show Answer


Q522) Which of the following practices has caused maximum damage to the biodiversity of Indian forests? Show Answer


Q523) 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


Q524) The amount of biodegradable organic matter in sewage water can be estimated by measuring Show Answer


Q525) Deforestation brings about Show Answer


Q526) Nitrogen oxides produced from the emission of automobiles and power plants are the source of fine air
borne particles which lead to Show Answer


Q527) Acid rains are produced by excess Show Answer


Q528) In almost all Indian metropolitan cities like Delhi, the major atmospheric pollutant (s) is /are Show Answer


Q529) Increasing skin cancer and damaged DNA in living organisms results due to Show Answer


Q530) What steps should be taken before the disposal of nuclear waste? Show Answer


Q531) Polyblend is a Show Answer


Q532) Which of the following is absent in polluted water? Show Answer


Q533) The post Bhopal gas disaster analysis showed that the accident started, when the leakage of a tank started
containing Show Answer


Q534) Undesirable changes in soil profile, affecting its productivity is called Show Answer


Q535) Which of the following problem is not created by noise pollution? Show Answer


Q536) If global warming continues, the organism which may face more severe threat is Show Answer


Q537) Domestic sewage contains Show Answer


Q538) UV-rays are non-ionizing type and are lethal due to inactivation of Show Answer


Q539) Which form of UV-radiation is allowed to pass through ozone and reach the earth surface? Show Answer


Q540) Measuring Biological Oxygen Demand (BOD) is a method used for Show Answer


Q541) 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


Q542) 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


Q543) Deforestation refers to Show Answer


Q544) 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


Q545) Which are the primary constituent of photochemical smog? Show Answer


Q546) Which of the following is a major source of radioactive pollution? Show Answer


Q547) Slash and burn agriculture is called Show Answer


Q548) One green house gas contributes 14% to total global warming and another contributes 6%. There are
respectively identified as Show Answer


Q549) Fly ash is a/an Show Answer


Q550) 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


Q551) The beauty of Taj Mahal is endangered due to Show Answer


Q552) 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


Q553) As we travels along the food chain, the concentration of DDT Show Answer


Q554) Soil erosion can be prevented by Show Answer


Q555) 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


Q556) Effect of pollution is observed first on Show Answer


Q557) 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


Q558) Which act was formulated in the year 1974? Show Answer


Q559) Clearing of waste water in Arcata Marsh involves Show Answer


Q560) In the phosphorus cycle, weathering makes phosphate available first to Show Answer


Q561) High amount of Escherichia coli in water indicates Show Answer


Q562) Which one of the following pairs of gases are the major cause of ‘Green house effect’? Show Answer


Q563) In plants, air pollution causes Show Answer


Q564) Recent reports of acid rains in big industrial cities are due to the effect of atmospheric pollution by Show Answer


Q565) Major cause of air pollution in big cities is Show Answer


Q566) Which one of the following statement is wrong in case Bhopal gas tragedy? Show Answer


Q567) 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


Q568) Which of the following gases does not cause acid rain? Show Answer


Q569) 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


Q570) The pollutants which are already present in nature, but are released in substantial amounts by man are
known as Show Answer


Q571) One of the chief causative factor of desertification is Show Answer


Q572) The national forest policy of India has recommended …A… % forest cover for the plains and …B… % for the
hills Show Answer


Q573) Ozone layer is being destroyed by Show Answer


Q574) 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


Q575) 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


Q576) Biochemical Oxygen Demand (BOD) in a river water Show Answer


Q577) Which of the following is not a device used to control a particulate matter? Show Answer


Q578) What was the aim of Chipko movement? Show Answer


Q579) 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


Q580) Lichens are described as indicator of Show Answer


Q581) The two gases making highest relative contribution to the green house gases are Show Answer


Q582) Which of the chemical reaction is not correct? Show Answer


Q583) Term used for accumulation of non-degradable pollutant in higher trophic level is Show Answer


Q584) Domestic sewage mainly contains …A… wastes which are readily decomposed with the help of …B… . Here
A and B refers to Show Answer


Q585) 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


Q586) 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


Q587) Decibel (dB) is a standard abbreviation used for the quantitative expression of Show Answer


Q588) Which of the following is not shortwave radiation? Show Answer


Q589) Euro II norms were stipulated to control Show Answer


Q590) 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


Q591) 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


Q592) 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


Q593) 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


Q594) 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


Q595) 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


Q596) 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


Q597) 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


Q598) 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


Q599) 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


Q600) BOD increased by Show Answer


Q601) Which of the following is not as a consequence of global warming? Show Answer