Practice Test


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


2) Radioactive pollution causes:


3) Air pollution causes:


4) Water pollution can be stopped best by:


5) Organic waste products:


6) Noise pollution causes:


7) During combustion of fuels, gases released are:


8) Environmental pollutant that can cause birth defects is:


9) As a general rule, ionizing radiation is most damaging to:


10) It is said that Taj may be destroyed due to:


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


12) The presence of ozone in the atmosphere of earth:


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


14) In Bhopal gas tragedy, the gas released was:


15) Aerosols are:


16) The 'Love Canal Incidence' is concerned with:


17) The "solution to pollution is dilution." This can be best correlated to:


18) Which of the following pollutants is not produced by exhaust of motor vehicles?


19) Minamata disease is a pollution related disease which results from:


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


21) What does the term 'over kill' deal with?


22) Radiation is health hazard because it causes:


23) In which industry, workers suffer from Byssinosis?


24) Spraying of DDT on crops produces pollution of:


25) The most widely existing pollutant in the air is:


26) If water pollution continues at its present rate, it will eventually:


27) Which of the following air pollutants is the chief cause of acid rains?


28) Which part of human body is first to be affected by nuclear radiations?


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


30) Photochemical smog is caused by formation of:


31) Where did the epidemic bone softening disease 'Itai Itai' occurred first?


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


33) WHO's recommendations about the industrial noise limit is of:


34) Contamination with radioactivity is dangerous because it causes:


35) A pollutant is any substance, chemical or other factor, that changes:


36) The molecular action of ultraviolet light is mainly reflected through:


37) In big cities automobiles are responsible for air pollution:


38) An important source of aerosol in upper atmosphere is:


39) Enriched air, if inhaled for long time, causes:


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


41) Strengthening of concept of environmental monitoring is due to concern for the:


42) Mudball technique has been proposed by:


43) Biomagnification is a process of:


44) Environmental monitoring helps in all except in:


45) Automobiles discharge hydrocarbons and nitrous oxide in atmosphere which is further converted to:


46) In Kolkata adults are suffereing from bronchitis TB, it is due to:


47) Air pollution is highest in:


48) Now-a-days DDT is not effective for killing mosquitoes because:


49) The population of hawks and eagles is declining because:


50) Certain epiphytic lichens indicate changing levels of atmospheric pollution, specially of:


51) Ozone layer is chiefly disturbed by:


52) Carbon monoxide is a very harmful pollutant because it:


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


54) Nuclear power generates:


55) Many organic substances or organisms help in clearing the water when found in:


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


57) The level of tolerance of DDT is 10 ppm in case of Daphnia, therefore Daphnia:


58) Better method of pest control is:


59) The pollutants emitted by jet aeroplances in outer atmosphere as fluorocarbons are known as:


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


61) Name the chemicals which cause bone cancer and tissue degeneration:


62) Nuclear explosion causes mainly:


63) UV radiations to disinfect polluted water is not generally recommended because:


64) UV radiations from sunlight cause the reaction that produce:


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


66) Which of the following is the main factor of water pollution?


67) Activated sludge is associated with management of waste and it is a kind of:


68) Which of the following is a largest source of formaldehyde vapour pollution in a room?


69) Term 'nuclear winter' is associated with:


70) Ozone layer in upper atmosphere is destroyed by:


71) The most dangerous radioactive air pollutant is:


72) Acid rain is caused by:


73) Which of the following is a qualitative pollutant?


74) DDT is a/an:


75) Decomposition of domestic wastes under natural processes is known as:


76) Which of the following causes fibrosis in lungs?


77) Which of the following is secondary pollutant?


78) The air pollution at source can be controlled by:


79) Biochemical oxygen demand means:


80) Hot water contains dissolved oxygen and then the BOD:


81) The gas which is produced in rice paddy and is associated with global warming is:


82) The newspaper contains one of the following toxic material. It is:


83) The nitrifying bacteria are:


84) Foul smell in the water of tanks, ponds etc is due to:


85) Photochemical smog is related to the pollution of:


86) Most important causative pollutant of soil may be:


87) Greenhouse effect is enhanced in the environment by the gas:


88) Most hazardous metal pollutant of automobile exhaust is:


89) Which susbtance provides protection from carcinogens?


90) Which is the main cause for desertification?


91) Taj Mahal is threatened due to the effect of:


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


93) "Mango necrosis" is due to:


94) Minamata disease of Japan which afflicted people with paralysis was traced to:


95) Depleting of ozone umbrella is due to:


96) The American aquatic weed, which has become a trouble in India is?


97) Which of the following causes "Greenhouse effect"?


98) NEERI is:


99) As it passes into food chain, the concentration of DDT:


100) Carbon monoxide kills because it destroys:


101) DDT concentration recorded in human body has been:


102) Lead is considered mainly:


103) Which one of the following is not pollutant?


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


105) What is the intensity of sound in normal conversation?


106) Reason of lung cancer is:


107) The result of Ozone hole is:


108) Ozone hole means:


109) Ganga Action plan was started in:


110) Fluoride pollution mainly affects:


111) E. coli is used as an indicator organism to determine pollution of water with:


112) BOD is a measure of:


113) Frequent occurrence of water blooms in a lake indicates which of the following?


114) A range of loudness of sound of 70-90 decibels is rated as:


115) Chernobyl nuclear tragedy occurred on which date:


116) Expand BOD:


117) The term ' Bio-magnification' refers to the:


118) This acts as bioindicator of air pollution:


119) In 1984, the Bhopal gas tragedy took place because methyl isocyanate:


120) Lead conc. In blood is considered alarming if it is:


121) 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:


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


123) Common indicator organism of water pollution is:


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


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


126) The noise produced in office is normally at the level of:


127) Photosynthetic Active Radiation (PAR) has the following range of wavelengths:


128) Which of the following is not used for disinfection of drinking water?


129) Which one of the following pairs is mismatched?


130) Identify the correctly matched pair:


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


132) Which one of the following statement pertaining to pollutants is correct?


133) Examples of regional pollutions are:


134) Greenhouse effect is due to:


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


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


137) Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is:


138) Photochemical smog pollution does not contain:


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


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


141) The Montreal protocol refers to:


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


143) 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?


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


145) Ultrasound of how much frequency is beamed into human body for sonography?


146) Which one of the following is not a bioindicator of water pollution?


147) Increase of BOD in water leads to:


148) Mercury pollution causes:


149) Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming?


150) 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.


151) Which one of the following pairs of gases are the major cause of "Greenhouse effect"?


152) Eutrophication is often seen in:


153) Which one of the following statements is wrong in case of Bhopal tragedy?


154) Which one of the following organisms is used as indicator of water quality?


155) 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?


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


157) 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:


158) Atmosphere absorbs maximum amount of:


159) Water pollution:


160) The noise pollution is measured in:


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


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


163) Electrostatic precipitator is for:


164) Lichens are indicators of:


165) Radiation pollution can be controlled by:


166) Symptoms of radiation are:


167) Polluted water will most commonly contain:


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


169) The most dangerous metal pollutant of automobile exhaust is:


170) The major contributor of Greenhouse gases to the atmosphere is:


171) Sewage drained into water bodies kill fishes because:


172) The phenomenon by which certain pollutants (e.g. DDT) accumulate in body tissue in increasing concentration is called


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


174) Algal bloom is caused by


175) Minamata disease is caused by contamination of


176) Increase skin cancer and high mutation rate are the result of


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


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


179) In treatment of waste water biological treatment is


180) By what degrees has the mean global temperature increased in the 20th century?


181) Which is non-degradable pollutant?


182) Which of the following is a natural pollutant?


183) As the organic waste input in a water body increases


184) Pick out the correct choice from the following


185) What are the organisms that can tolerate high degrees of pollution called as?


186) The process of nutrient enrichment of water is called as ________.


187) When and where the Ozone hole was discovered?


188) The Earth Summit, 1992, was held at


189) In India, Jhum cultivation is practiced mainly in


190) Thickness of ozone is measured in


191) Green muffler is used against which type of pollution?


192) 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.


193) Which of the following is correct about "El Nino effect"?


194) 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.


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


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


197) When domestic sewage mixes with river water


198) ______ are used in electrostatic precipitators


199) Biological oxygen demand of _______ is the least.


200) Due to eutrophication _______.


201) _____ is the first step of sewage treatment.


202) We and our surroundings together are called


203) Which of the following is not an environmental problem?


204) Volcano is _______ source of pollution.


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


206) BOD is _______ in polluted water and _______ in potable water.


207) Which pollutants are responsible for bronchitis?


208) Which method is used to control pollutants of particulate nature?


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


210) 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.


211) Primary pollutants used in the synthesis of photochemical smog are


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


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


214) 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.


215) There are working, 'EcoSan' toilets in many areas of


216) Which statement is false?


217) DDT causes


218) 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.


219) 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.


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


221) 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


222) Cleaning of waste water in Arcata Marsh involves


223) Eco-san toilets are not associated with which of the following?


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


225) Choose the odd one our w.r.t. ozone depletion in the stratosphere


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


227) 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


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


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


230) As the exhaust passes through the catalytic converter


231) Photochemical smog differs from classical/London smog in


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


233) The thickness of ozone over poles changes with the season being lowest in


234) 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.


235) Amrita Devi Bishnoi Wildlife protection Award is given to the individuals or communities from


236) The Ozone hole over Antarctica develops each year between


237) 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.


238) Heavy metals defined as elements with density ________ are harmful to ecological systems.


239) 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


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


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


242) Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?


243) 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?


244) Which of the following is not a greenhouse gas?


245) 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.


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


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


248) What contributes the most to acid rain?


249) Which of the following techniques is not example of bioremediation or phytoremediation?


250) A dose that is represented as LD50.


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


252) Temperature inversions, heat islands, and dust domes are the result of ______.


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


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


255) Which one is incorrect?


256) The addition of sewage and other organic material into a water supply _______.


257) The ozone in the earth's atmosphere screens out


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


259) 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?


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


261) 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?


262) The single best way to reduce acid deposition would be to


263) Which of the following contributes to both global warming and ozone thinning?


264) Which part of the CFC molecule attacks ozone?


265) 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?


266) Since the Montreal Protocol was signed


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


268) Cultural or Accelerated Eutrophication lakes is most often caused by input of


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


270) Secondary sewage treatment


271) Which of the following is considered the greatest problem associated with the use of pesticides?


272) 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.


273) 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.


274) 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


275) Pollution of big cities can be controlled to large extent by


276) Among the following environmental pollutants which has the problem of bio-magnification


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


278) UV radiation is injurious to plants because it


279) 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?


280) "Good ozone" is found in the


281) Which of the following is a chlorofluocarbon?


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


283) Secondary sewage treatment is mainly a


284) Which one of the following expanded forms of the following acronyms is correct?


285) The domestic sewage in large cities


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


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


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


289) 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


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


291) Which one of the following is a wrong statement?


292) Measuring Biochemical Oxygen Demand (BOD) is a method used for


293) Which of the following statements regarding the greenhouse effect has the lowest degree of certainty?


294) Which of the following air pollutants has shown the greatest decline in recent years?


295) Bhopal gas tragedy of 1984 took place because methyl isocyanate reacted with


296) 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?


297) The ideal modern sewage system is one in which


298) The term activated sludge is used for a common secondary treatment technique because


299) One impediment to the use of treated sludge as agricultural fertilizer is


300) Global warming can be controlled by


301) The Air Prevention and Control of Pollution Act came into force in


302) Kyoto Protocol was endorsed at


303) A citizen group called Friends of the Arcata Marsh (FOAM) basically belongs to


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


305) A location with luxuriant growth of lichens on the trees indicates that the


306) The zone of atmosphere in which the ozone layer is present is called


307) A scrubber in the exhaust of a chemical industrial plant removes


308) Main cause of Eutrophication is


309) Which of the following is true for eutrophicated water body?


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


311) The prime contaminants in lakes eutrophied by sewage and agricultural wastes are


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


313) What percentage of impurities make domestic sewage unfit for human use?


314) 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?


315) The second commitment period of Kyoto Protocol was extended from


316) 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?


317) The polluting strength of sewage is usually characterized by its.


318) Which of the following would most likely help to slow down the greenhouse effect?


319) Wildlife Protection Act India was implemented in the year


320) Which one of the following combinations is wrong?


321) Relationship between DO an BOD is that they


322) 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.


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


324) Now-a-days, use of DDT as insecticide is banned because


325) Rachel Carson's famous book "Silent Spring" is related to


326) 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?


327) High value of BOD (Biochemical Oxygen Demand) indicates that


328) The UN Conference of Parties on climate change in the year 2011 was held in


329) Acid rain is caused by increase in the atmospheric concentration of


330) Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of


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


332) Increase in concentration of the toxicant at successive trophic levels is known as


333) Recently Paris held a CoP summit, which CoP summit was this?


334) Give the full form of CoP in ecology


335) Joint Forest Management Concept was introduced in India during


336) A river with an inflow of domestic sewage rich in organic waste may result in


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


338) A lake which is rich in organic waste may result in


339) The highest DDT concentration in aquatic food chain shall occur in


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


341) 'Ozone layer' is located in


342) Which of the following combination is wrong?


343) Which of the following binds with haemoglobin irreversibly?


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


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


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


347) Which one of following is not an air pollutant?


348) DDT residues are rapidly passed through food chain causing biomagnifications because DDT is


349) Rain is called acid rain when its pH is below


350) CFCs are responsible for


351) Acid rain is due to


352) Noise is


353) 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?


354) High level radioactive waste can be managed in which of the following ways?


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


356) Which one of the following is mainly responsible for green houses effect?


357) 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?


358) 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


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


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


361) 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


362) Green house gases are


363) In which state of India, Ecosave toilets are not found?


364) Identify the correctly matched pair.


365) The main cause of pollution is metrocities is


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


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


368) Kyoto protocol is related with


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


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


371) Desertification has become a major problem due to


372) 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?


373) Eutrophicated lake has BOD


374) 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


375) 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?


376) Photochemical smog formed in congested metropolitan cities mainly consist of


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


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


379) The cause of decline in the population of reptiles and birds is


380) 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?


381) Increase in concentration of a toxicant at successive trophic levels is called


382) 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


383) Secondary sewage treatment is mainly a


384) Which of the following diseases is related to cadmium pollution?


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


386) 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?


387) Study the following statements regarding Ecosave toilet and select the incorrect ones


388) The atmosphere around earth is warmed because


389) Earth’s climate


390) Jhum cultivation refers to


391) Which of the following is not a green house gas?


392) Minamata occurs in


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


394) The concept of Joint Forest Management (JFM) involves


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


396) This pollutant causes burning sensation of throat and eyes and vomiting sensation


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


398) The major goal of the green revolution was to


399) In scrubber, the exhaust is passed through a


400) During day time, sound level is silent zone is


401) The unfavorable alteration of environment due to human activities is termed as


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


403) Expanded from of BOD is


404) Relative Biological Effectiveness (RBE) usually refers to the damage caused by


405) The possible beneficial aspect of grazing animals is the


406) Ozone hole results in


407) 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?


408) The intensity levels of whispering noise is


409) 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?


410) The main component of photochemical smog is


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


412) In acid rain, SO2 accounts by


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


414) 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?


415) BOD is concerned with


416) 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


417) Cutting of trees in a forest is called


418) Which one of the following is a major pollutant of automobile gases?


419) Which of the following are the example of industrial solid wastes?


420) World most problematic aquatic weed is


421) Solid waste can be


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


423) Biomagnification is highest in


424) Polyblend


425) The ozone layer is found in


426) Which of the following health problem originates due to the inhalation of fine particulate matter?


427) Irreparable computers and other electronic goods are known as


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


429) Peeling of ozone umbrella, which protects us from UV rays, is caused by


430) Chipko movement was started in Garhwal, Himalayas in


431) Ultraviolet radiations from sunlight causes a reaction that produces


432) Ozone hole is largest over


433) Ozone depletion is occurring widely in


434) Chipko movement was successfully launched by


435) Stirred-tank bioreactors have been designed for


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


437) Which of the following statement pertaining to pollutants is correct?


438) Which of the following are the indicators of pollution?


439) To remove which pollutants, enzymatic filters are used?


440) What is the major cause of desertification?


441) ESP is to arrest


442) Reforestation is useful for


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


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


445) Eutrophication is caused by


446) Examples of regional pollution are


447) World Summit on Sustainable Development (2002) was held in


448) Which statement represents the harmful effect of depletion of earth’s ozone layer?


449) Which of the following statement is not correct?


450) 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


451) World environment day is celebrated on


452) A lake with nutrients is called


453) Three mile island and chernobyl disasters are associated with accidental leakage of


454) Ozone is spread in the swimming pool because


455) 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


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


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


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


459) 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


460) Irrepairable goods, computers and other electronic devices are known as


461) 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?


462) Scrubber is used to remove gases like


463) 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?


464) 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


465) Cigarette smoking causes


466) Ozone saves the biosphere by absorbing the high energy radiation called


467) The fertile top soil is removed by human activities like


468) Which of the following statement is correct?


469) Algal blooms imparts a distinct colour to water due to


470) Pollution is not caused by


471) The term ‘biomagnification’ refers to the


472) Carbon dioxide is called green house gas because it is


473) One of the following acts as secondary pollutant


474) Which of the following toxic materials was present in Minamata bay of Japan?


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


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


477) Common indicator organism of water pollution is


478) Kyoto protocol has specified the commitments of different countries


479) Which of the following groups of gases cause photochemical smog?


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


481) 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


482) In India, the heaviest demand of forests is for


483) The ultraviolet radiations in the stratosphere are absorbed by


484) Carbon monoxide is a pollutant because it


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


486) In big cities, the major atmospheric pollutant is


487) Steps taken by the Government of India to control air pollution include


488) Which of the following plants is used for the purification of water?


489) Which of the following is non-biodegradable?


490) Minamata disease was caused due to the consumption of


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


492) ‘Bad’ ozone is formed in


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


494) Green-house effect refers to


495) 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


496) A pollutant can best defined as it


497) 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?


498) What is true about the Euro II norms?


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


500) 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?


501) Excess atmospheric CO2 increase green house effect as CO2


502) Removal of forest areas to fulfil the needs of growing human population is called


503) Which of the following is a secondary air pollution?


504) Maximum green house gases are released by


505) In 2002 AD, according to research, the concentration of CFCsreached to


506) 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?


507) Which Act was formulated in the year 1986?


508) Which one of the following pairs is mismatched?


509) Good ozone is formed in


510) Ozone layer is depleted by


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


512) El Nino effect is closely associated with


513) One of the main reasons of soil erosion in India is


514) Maximum noise permissible during day time in residential areas is


515) When the noise was recognized as an air pollutant?


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


517) Taj Mahal marble is affected by


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


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


520) Rise in temperature leads to deleterious changes in environment resulting in odd climatic changes called


521) A lake with an inflow of domestic sewage rich in organic waste may result in


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


523) Nutrient enrichment of a lake will cause


524) Sound becomes a hazardous noise pollution if its level exceeds


525) Old pollutant amongst the following is


526) What is soil erosion?


527) Ozone depletion in stratosphere shall result in


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


529) Which of the following is not an air pollutant?


530) Montreal protocol aims at


531) Sulphur dioxide causes


532) Forests in India, according to Central Forestry Commission (1980) are about


533) 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


534) Which element is caused of itai-itai disease?


535) Organic farming is the technique of raising crops through the use of


536) Loss of forest, urbanization, increasing pollution are all due to


537) Motor vehicles equipped with catalytic converter should use unleaded petrol because lead


538) The accelerated ageing of lakes due to sewage and agricultural and industrial waste is called


539) Which of the following is biodegradable pollutant?


540) Eutrophication results in reduction of


541) Which one of the following gases can deplete ozone layer in the upper atmosphere?


542) 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


543) In the treatment of waste water discharge, which treatment stage involves biological treatment?


544) Increase in toxic concentration from one trophic level to another trophic level is called


545) 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?


546) Which of the following is a point source of pollution


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


548) 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?


549) Gaseous pollutants can be controlled by


550) CFCs are not recommended to be used in refrigerators because they


551) Green house effect with respect to global climate refers to


552) Foul smell in the water bodies of tanks, ponds ,etc, is due to


553) Green house effect is due to the increased concentration of


554) 5th June is celebrated as


555) Effect of pollution is on


556) Minamata disease is caused due to presence of ………….. in water.


557) Which one of the chemical is responsible for the reduction of ozone content of the atmosphere?


558) 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


559) Biochemical Oxygen Demand (BOD) is a measure of


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


561) 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?


562) 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?


563) 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


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


565) The term ‘Terror of Bengal’ is used for


566) Which one is incorrect for the effects of deforestation?


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


568) Which of the following compounds are well known for biological magnification?


569) Catalytic converter in vehicle is used for controlling


570) Which of the following statement is correct about DDT?


571) NEERI is situated in


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


573) Choose the correct statement regarding the catalytic converters


574) 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?


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


576) One of the human disease due to biomagnifications of heavy metals is


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


578) Which of the following practices has caused maximum damage to the biodiversity of Indian forests?


579) 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?


580) The amount of biodegradable organic matter in sewage water can be estimated by measuring


581) Deforestation brings about


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


583) Acid rains are produced by excess


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


585) Increasing skin cancer and damaged DNA in living organisms results due to


586) What steps should be taken before the disposal of nuclear waste?


587) Polyblend is a


588) Which of the following is absent in polluted water?


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


590) Undesirable changes in soil profile, affecting its productivity is called


591) Which of the following problem is not created by noise pollution?


592) If global warming continues, the organism which may face more severe threat is


593) Domestic sewage contains


594) UV-rays are non-ionizing type and are lethal due to inactivation of


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


596) Measuring Biological Oxygen Demand (BOD) is a method used for


597) 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


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


599) Deforestation refers to


600) 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?


601) Which are the primary constituent of photochemical smog?


602) It is used in refrigerator and air conditioners and it is a source of CI


603) Which of the following is a major source of radioactive pollution?


604) Slash and burn agriculture is called


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


606) Fly ash is a/an


607) 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?


608) The beauty of Taj Mahal is endangered due to


609) 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


610) As we travels along the food chain, the concentration of DDT


611) Soil erosion can be prevented by


612) 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… %


613) Effect of pollution is observed first on


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


615) Which act was formulated in the year 1974?


616) 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… %


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


618) Clearing of waste water in Arcata Marsh involves


619) In the phosphorus cycle, weathering makes phosphate available first to


620) Terracing is done in


621) High amount of Escherichia coli in water indicates


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


623) In plants, air pollution causes


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


625) Major cause of air pollution in big cities is


626) Which one of the following statement is wrong in case Bhopal gas tragedy?


627) Why ozone is known as ‘chemical weed’?


628) 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?


629) Which of the following gases does not cause acid rain?


630) 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?


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


632) One of the chief causative factor of desertification is


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


634) Hydrogen sulphide causes


635) Which of the following statements regarding decomposition is false?


636) Ozone layer is being destroyed by


637) 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?


638) 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?


639) Biochemical Oxygen Demand (BOD) in a river water


640) 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


641) Which of the following is not a device used to control a particulate matter?


642) What was the aim of Chipko movement?


643) 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?


644) Lichens are described as indicator of


645) The two gases making highest relative contribution to the green house gases are


646) Which of the chemical reaction is not correct?


647) Term used for accumulation of non-degradable pollutant in higher trophic level is


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


649) Which insecticide is more hazardous to human health?


650) 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


651) 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?


652) Decibel (dB) is a standard abbreviation used for the quantitative expression of


653) Which of the following is not shortwave radiation?


654) Euro II norms were stipulated to control


655) 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


656) 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


657) 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


658) 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


659) 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


660) 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.


661) 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


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


663) 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


664) 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


665) 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


666) 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.


667) BOD increased by


668) Which of the following is not as a consequence of global warming?