Pollution – Old Year Questions

Basic Questions

1. Human-made pollutants are called –

(a) Xenobiotics
(b) Antibiotics
(c) Humalins
(d) Anthropogenic

[U.P.P.C.S. (Pre) 2005]

 

2. The environment modified by human activities is called

(a) Natural environment
(b) Anthropogenic environment
(c) Urban environment
(d) Modern environment

[U.P.P.C.S. (Pre) 2019]

 

3. Bio-degradable pollutant is

(a) Mercury
(b) Sewage
(c) Plastic
(d) Asbestos

[U.P.P.C.S. (Pre) 2014]

 

4. The combustion of coal, petrol and diesel etc. is the basic source of –

(a) Water pollution
(b) Land pollution
(c) Air pollution
(d) Noise pollution

[U.P.P.C.S. (Mains) 2011]

 

5. Which of the following energy sources produces NO atmospheric pollution?

(a) Nuclear energy
(b) Solar energy
(c) Petroleum energy
(d) Coal energy

[U.P. P.C.S. (Pre) 2018]

 

6. Which of the following is a biodegradable pollutant?

(a) Sewage
(b) Asbestos
(c) Plastic
(d) Polythene

[U.P.P.C.S. (Mains) 2016]

 

7. Which of the following is produced during the formation of photochemical smog?

(a) Hydrocarbons
(b) Nitrogen Oxides
(c) Ozone
(d) Methane

[I.A.S. (Pre) 2003]

 

8. Photochemical smog is a resultant of the reaction among.

(a) NO2 , O3 and peroxyacetyl nitrate in the presence of sunlight
(b) CO, O2 and peroxyacetyl nitrate in the presence of sunlight
(c) CO, CO2 and NO2 at low temperature
(d) High concentration of NO2 , O3 and CO in the evening

[I.A.S. (Pre) 2013]

 

9. Smog is essentially caused by the atmospheric presence of :

(a) Oxygen and ozone
(b) Ozone and nitrogen
(c) Oxygen and nitrogen
(d) Oxide of nitrogen and sulphur

[U.P.P.C.S. (Pre) 2019]

 

10. Which of the following is the reason behind the maximum noise pollution?

(a) Heavy Traffic
(b) Election Meetings
(c) Rock Music
(d) Jet Flight

[U.P. Lower Sub. (Pre) 2003]

 

11. During normal conditions, the gas which pollutes the atmosphere is –

(a) Carbon Monoxide (CO)
(b) Carbon dioxide (CO2 )
(c) Nitrogen (N2 )
(d) Oxygen (O2 )

[U.P.U.D.A./L.D.A. (Pre) 2006]

 

12. Which one of the following is not a secondary pollutant?

(a) PAN
(b) Smog
(c) Sulphur dioxide
(d) Ozone

[U.P.P.C.S. (Pre) 2014]

 

13. Colourless gas coming out from motor vehicle and cigarette due to incomplete combustion is –

(a) Carbon dioxide
(b) Nitrous oxide
(c) Carbon monoxide
(d) Methane

[Uttarakhand U.D.A./L.D.A. (Pre) 2003]

 

14. Pollutant emission gas in vehicle exhaust is mainly –

(a) Carbon dioxide
(b) Carbon monoxide
(c) Marsh gas
(d) Nitrogen oxide

[Uttarakhand P.C.S. (Pre) 2002, 44th B.P.S.C. (Pre) 2000]

 

15. Combustion of petrol in automobiles pollutes the air by producing the following metal.

(a) Mercury
(b) Cadmium
(c) Lead
(d) Carbon Dioxide
(e) None of these

[Chhattisgarh P.C.S. (Pre) 2015]

 

16. Which of the following air pollutants get dissolved in the haemoglobin of the blood more rapidly than oxygen?

(a) PAN
(b) Carbon dioxide
(c) Carbon monoxide
(d) Ozone

[U.P.P.C.S. (Pre) 2016]

 

17. The non-biotic pollutant in underground water is –

(a) Bacteria
(b) Algae
(c) Arsenic
(d) Viruses

[U.P.P.C.S.(Pre) 2012]

 

18. Water pollution of river is measured by –

(a) Amount of Chlorine dissolved in water
(b) Amount of Ozone dissolved in water
(c) Amount of Nitrogen dissolved in water
(d) Amount of Oxygen dissolve in water

[U.P.R.O./A.R.O. (Pre) 2021]

 

19. Indiscriminate use of fertilizers has led to :

(a) Soil Pollution
(b) Water pollution
(c) Air pollution
(d) All of the above

[U.P.P.C.S. (Pre) 2016]

 

20. The highest chemical pollution is caused by the industrial effluents of :

(a) Leather industry
(b) Paper industry
(c) Rayon industry
(d) Textile industry

[U.P.P.C.S. (Pre) 2005]

 

21. Acid rain is due to air pollution by–

(a) Carbon dioxide
(b) Carbon monoxide
(c) Methane
(d) Nitrous oxide and Sulphur dioxide

[U.P.P.C.S.(Pre) 2013]

 

22. Which one of the following is an air pollutant gas and is released by burning fossil fuel?

(a) Hydrogen
(b) Nitrogen
(c) Oxygen
(d) Sulphur dioxide

[U.P.P.C.S. (Mains) 2011]

 

23. Which one of the following is not related to air pollution?

(a) Smog
(b) Acid Rain
(c) Eutrophication
(d) Asbestosis

[U.P.P.C.S. (Mains) 2013]

 

24. Fly ash pollution is caused by

(a) Oil re! ning
(b) Fertilizer industry
(c) Thermal power plant
(d) Mining

[U.P.P.C.S. (Mains) 2004, U.P.P.C.S. (Pre) 2021]

 

25. Green Muffler is related to –

(a) Soil pollution
(b) Air pollution
(c) Noise pollution
(d) Water pollution

[U.P.P.C.S. (Pre) 2014]

 

26. Bhopal Gas Tragedy (leakage of methyl isocyanate ‘MIC’) accident happened on –

(a) December 2, 1982
(b) December 3, 1985
(c) December 3, 1984
(d) December 4, 1986

[Uttarakhand U.D.A./L.D.A. (Pre) 2007]

 

27. Which gas leaked out, in the Bhopal Gas Tragedy causing numerous deaths:

(a) Chlorine
(b) M.I.C.
(c) Ammonia
(d) Phosgene

[M.P.P.C.S. (Pre) 1991, U.P.P.C.S.(Pre) 2001]

 

28. Polythene bags cannot be destroyed because they are made of –

(a) Unbreakable molecules
(b) Inorganic compounds
(c) Polymers
(d) Proteins

[U.P.P.C.S. (Pre) 2007]

 

29. Which of the following is not destroyed by bacteria?

(a) Cow dung
(b) Leafs
(c) Food ingredient
(d) Plastic

[R.A.S./R.T.S. (Pre) 1992]

 

30. Which one of the following is biodegradable?

(a) Plastic
(b) Polythene
(c) Mercury
(d) Rubber

[U.P.R.O./A.R.O. (Pre) 2014]

 

31. Which of the following takes maximum time to decay?

(a) Cigarette bud
(b) Leather shoe
(c) Photo film
(d) Plastic bag

[U.P.P.C.S. (Spl) (Pre) 2008]

 

32. Which one of the following is a bioindicator of air pollution?

(a) Lichen
(b) Fern
(c) Money plant
(d) Dodder

[U.P.P.C.S.(Pre) 2013, U.P.U.D.A./L.D.A. (Spl) (Pre) 2010]

 

33. Which of the following is an indicator of air pollution?

(a) Puff balls
(b) Algae
(c) Lichen
(d) Moss

[U.P.P.C.S. (Pre) 2021]

 

34. Biological Oxygen Demand (BOD) is an indication of pollution in :

(a) Aquatic environment
(b) Soil
(c) Air
(d) All the above

[Uttrakhand U.D.A./L.D.A. (Mains) 2007]

 

35. A water body having high B.O.D. indicates that its water is –

(a) Receiving minerals
(b) Being aerated
(c) Being contaminated by sewage
(d) Atrophic

[U.P.P.C.S. (Pre) 2007]

 

36. With reference to Eutrophication, which of the following statements is/are correct?

1. It is a phenomenon of nutrient enrichment of a water body.
2. It depletes the dissolved oxygen in the water.

Select the correct answer using the codes given below :

Codes :

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

[U.P.P.C.S. (Pre) 2019]

 

37. BOD is maximum in the Ganga River between :

(a) Haridwar and Kanpur
(b) Kanpur and Allahabad
(c) Allahabad and Patna
(d) Patna and Uluberia

[U.P.P.C.S. (Spl) (Mains) 2008]

 

38. Bioremediation means:

(a) Elimination of toxic pollutant from the environment by organisms
(b) Biocontrol of pathogens and pests
(c) Transplantation of organs in the body
(d) Diagnosis of diseases by the help of microorganisms

[R.A.S./R.T.S.(Pre) 2007]

 

39. In the context of solving pollution problems, what is/are the advantage/advantages of bioremediation techniques?

1. It is a technique for cleaning up pollution by enhancing the same biodegradation process that occurs in nature.
2. Any contaminant with heavy metals such as cadmium and lead can be readily and completely treated by bioremediation using microorganisms.
3. Genetic engineering can be used to create microorganisms specifically designed for bioremediation.

Select the correct answer using the codes given below:

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

[I.A.S. (Pre) 2017]

 

40. Which of the following is not a water pollutant?

(a) Zinc
(b) Copper
(c) Nickel
(d) Sulphur Dioxide

[U.P.P.C.S. (Mains) 2011]

 

41. The problem of water pollution with Arsenic is maximum in –

(a) Haryana
(b) Rajasthan
(c) Madhya Pradesh
(d) West Bengal

[U.P.P.C.S. (Pre) (Re. Exam.) 2015]

 

42. The Chornobyl accident is related with

(a) Nuclear accident
(b) Earthquake
(c) Flood
(d) Acid rain
(e) None of these

[Chhattisgarh P.C.S. (Pre) 2015]

 

43. Which of the following is a biodegradable pollutant?

(a) Asbestos
(b) DDT
(c) Plastic
(d) Sewage

[Uttarakhand P.C.S. (Pre) 2010]

 

44. The most toxic metal pollutant of automobile exhaust is

(a) Copper
(b) Lead
(c) Cadmium
(d) None of the above

[U.P.P.C.S. (Mains) 2009, U.P.P.C.S. (Pre) 2006, U.P.P.C.S. (Mains) 2006, U.P. U.D.A./L.D.A. (Pre) 2006]

 

45. The most polluted city in India is –

(a) Ankleshwar
(b) Lucknow
(c) Ludhiana
(d) Raipur

[U.P.P.C.S. (Mains) 2009]

 

46. According to the report released by Greenpeace India in January, 2020, amongst 287 Indian cities, which of the following is the most polluted city?

(a) Raniganj
(b) Jharia
(c) Bajrang Nagar
(d) Sohagpur

[U.P.B.E.O. (Pre) 2019]

 

47. Which was the seasonal factor responsible for the intense cold in northern India in January, 2012?

(a) Deforestation
(b) Atmospheric pollution
(c) La Nina
(d) Al Nino

[U.P.U.D.A./L.D.A. (Spl) (Mains) 2010]

 

48. Which of the following rivers is called ‘biological desert’ on account of its pollutants?

(a) Yamuna
(b) Periyar
(c) Damodar
(d) Mahanadi

[U.P.P.C.S.(Pre) 2012]

 

49. Which of the following is used as an adulterant of a mustard seed?

(a) Argimon seed
(b) Papaya seed
(c) Cumin seed
(d) Coriander seed

U.P.U.D.A/L.D.A. (Spl) (Pre) 2010]

 

50. Why is there a great concern about the ‘microbeads’ that are released into environment?

(a) They are considered harmful to marine ecosystem.
(b) The are considered to cause skin cancer in children.
(c) They are small enough to be absorbed by crop plants in irrigated fi elds.
(d) They are often found to be used as food adulterants.

[I.A.S. (Pre) 2019]

 

51. Which one of the following is known for cleaning a polluted environment?

(a) Oxygen
(b) Rain
(c) Nitrogen
(d) Air

[U.P.U.D.A/L.D.A. (Pre) 2013]

 

52. The Union Cabinet has approved MoU between India and SACEP for cooperation on oil and chemical pollution in the South Asian seas region. What does SACEP stand for?

(a) South Asia Compatibility Environment Programme
(b) South Asia Cooperative Environment Programme
(c) South Asia Connectivity Environment Programme
(d) South Asia Coercive Environment Programme
(e) None of the above/More than one of the above

[63rd B.P.S.C. (Pre) 2017]

 

High-Level Questions

1. There is a concern over the increase in harmful algal blooms in the sea-waters of India. What could be the causative factors for this phenomenon?

1. Discharge of nutrients from the estuaries.
2. Run-off from the land during the monsoon.
3. Upwelling in the seas.

Select the correct answer using the codes given below:

(a) 1 only
(b) 1 and 2
(c) 2 and 3
(d) 1, 2 and 3

[I.A.S. (Pre) 2011]

 

2. As per the Solid Waste Management Rules, 2016 in India, which one of the following statements is correct?

(a) Waste generator has to segregate waste into five categories
(b) The Rules are applicable to notified urban local bodies, notified towns, and all industrial townships only.
(c) The Rules provide for exact and elaborate criteria for the identification of sites for landfills and waste processing facilities.
(d) It is mandatory on the part of the waste generator that the waste generated in one district cannot be moved to another district.

[I.A.S. (Pre) 2019]

 

3. Asian Brown Cloud, 2002 was mainly spared over –

(a) East Asia
(b) South-East Asia
(c) South Asia
(d) West Asia

[Uttarakhand U.D.A./L.D.A. (Pre) 2003]

 

4. In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol into stratosphere?

(a) Creating the artificial rains in some regions
(b) Reducing the frequency and intensity of tropical cyclones
(c) Reducing the adverse effects of solar wind on the Earth
(d) Reducing the global warming

[I.A.S. (Pre) 2019]

 

5. In the context of which one of the following are the terms ‘pyrolysis and plasma gasification’ mentioned?

(a) Extraction of rare earth elements
(b) Natural gas extraction technologies
(c) Hydrogen fuel-based automobiles
(d) Waste-to-energy technologies

[I.A.S. (Pre) 2019]

 

6. Assertion: During winter, air pollution in Delhi reaches the maximum level.
Reason: The combustion process in motor vehicles
increases during winter.

(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.

[U.P. Lower Sub. (Pre) 2004]

 

7. The most important indoor air pollutant is –

(a) Sulpher Dioxide
(b) Carbon Dioxide
(c) Nitrogen Dioxide
(d) Radon gas
(e) None of these

[Chhattisgarh P.C.S. (Pre) 2015]

 

8. Cigarette smoke contains –

(a) Carbon monoxide dioxide
(b) Carbon monoxide and nicotine
(c) Carbon monoxide and Benzene
(d) Dioxycine and Benzene

[U.P.P.C.S. (Pre) (Re. Exam) 2015]

 

9. Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning?

1. Smelting units
2. Pens and pencils
3. Paints
4. Hair oils and cosmetics

Select the correct answer using the code given below:

(a) 1, 2 and 3
(b) 1 and 3
(c) 2 and 4
(d) 1, 2, 3 and 4

[I.A.S. (Pre) 2012]

 

10. Match List-I with List-II and select the correct answer by using codes given below the lists:

List-I  List-II
(Air Pollutant)   (Part affected)
A. Asbestos Dust 1. Brain
B. Lead 2. Stomach
C. Mercury 3. Lung
D. Carbon Monoxide 4. Bloodstream

Codes :

A B C D
(a) 1 2 3 4
(b) 3 1 2 4
(c) 3 2 4 1
(d) 2 3 1 4

[U.P.P.C.S.(Pre) 2012]

 

11. Match List-I with List-II and select the correct answer from codes given below the lists :

List-I List-II
(Pollutants) (Effects)
A. Carbon monoxide 1. Damage to liver and kidney
B. Oxides of Nitrogen 2. Cancer
C. Soil Particles  3. Ailment related to breathing
D. Lead D. Lead 4. Central nervous system

Codes:

A B C D
(a) 2 3 4 1
(b) 4 3 2 1
(c) 1 2 3 4
(d) 4 3 1 2

[U.P.P.C.S. (Pre) 2008]

 

12. Which of the following are some important pollutants released by the steel industry in India?

1. Oxides of sulphur
2. Oxides of nitrogen
3. Carbon monoxide
4. Carbon dioxide

Select the correct answer using the codes given below.

(a) 1, 3 and 4 only
(b) 2 and 3 only
(c) 1 and 4 only
(d) 1, 2, 3 and 4

[I.A.S. (Pre) 2014]

 

13. Which of the following countries suffer from the acid rains?

1. Canada
2. France

3. Norway
4. Germany

Select the correct answer from the codes given below:

Codes :

(a) 1 and 2
(b) 1 and 3
(c) 2 and 3
(d) 3 and 4

[U.P.P.C.S (Pre) 2011]

 

14. Which one of the following countries receives the most acid rain:

(a) China
(b) Japan
(c) Norway
(d) the USA

[U.P.P.C.S. (Pre) 2000]

 

15. Consider the following

1. Carbon dioxide
2. Oxides of Nitrogen
3. Oxides of Sulphur

Which of the given above is/are the emission/emissions from coal combustion at thermal power plants ?

(a) 1 only
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3

[I.A.S. (Pre) 2011]

 

16. Match List–I with List–II and select the correct answer  from the codes given below the lists :

List–I  List–II
(Phenomenon) (Compounds)
A. Acid Rain 1. Chlorofluoro Carbon
B. Photochemical Smog 2. Carbon Monoxide
C. Combination 3. Sulphur dioxide with Haemoglobin
D. Depletion of 4. Unsaturated Ozone Layer Hydrocarbons

A B C D
(a) 1 2 3 4
(b) 3 2 4 1
(c) 3 4 2 1
(d) 1 3 2 4

[U.P.B.E.O. (Pre) 2019]

 

17. In the context of proposals for the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements:

1. The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions.
2. H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions.
3. Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses.
4. H-CNG makes the fuel less expensive than CNG.

Which of the statements given above is/are correct?

(a) 1 only
(b) 2 and 3 only
(c) 4 only
(d) 1, 2, 3, and 4

[I.A.S. (Pre) 2019]

 

18. Concerning ‘fly ash’ produced by the power plants using coal as fuel, which of the following statements is/are correct?

1. Fly ash can be used in the production of bricks for building construction.
2. Fly ash can be used as a replacement for some of the Portland cement concrete.
3. Fly ash is made up of silicon dioxide and calcium oxide only and does not contain any toxic elements.

Select the correct answer using the codes given below:

(a) 1 and 2
(b) 2 only
(c) 1 and 3
(d) 3 only

[I.A.S. (Pre) 2015]

 

19. Which of the following are the reasons/factors for exposure to benzene pollution?

1. Automobile exhaust
2. Tobacco smoke
3. Woodburning
4. Using varnished wooden furniture
5. Using products made of polyurethane

Select the correct answer using the code given below :

(a) 1, 2 and 3 only
(b) 2 and 4 only
(c) 1, 3 and 4 only
(d) 1, 2, 3, 4 and 5

[I.A.S. (Pre.) 2020]

 

20. Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins, which are not destroyed by the normal cooking process. Aflatoxins are produced by:

(a) Bacteria
(b) Protozoa
(c) Moulds
(d) Viruses

[I.A.S. (Pre) 2013]

 

21. Which one of the following is not an instrumental device to check air pollution?

(a) Bag Filter
(b) Cyclone Collector
(c) Cyclone Separator
(d) Cyclone Divider

[U.P.P.C.S. (Mains) 2013]

 

22. Which of the following statements about Radioactive pollution are correct?

1. It causes a hereditary change in the animals.
2. It causes disbalance among different minerals in the soil.
3. It hinders blood circulation.
4. It causes carcinogenesis.

Select the correct answer from the codes given below:

Codes :

(a) 1 and 2
(b) 1 and 4
(c) 1, 3 and 4
(d) 2, 3 and 4

[U.P.P.C.S. (Pre) 2009]

 

23. Recently, ‘oil zapper’ was in the news. What is it?

(a) It is an eco-friendly technology for the remediation of oily sludge and oil spills
(b) It is the latest technology developed for undersea oil exploration
(c) It is a genetically engineered high biofuel-yielding Maize variety
(d) It is the latest technology to control the accidentally caused flames from oil wells.

[I.A.S. (Pre) 2011]

 

24. The headquarters of the International Maritime Organization is located in :

(a) London
(b) Geneva
(c) Paris
(d) Rome

[U.P.P.C.S. (Mains) 2016]

 

25. Concerning bio-toilets used by the Indian Railways, consider the following statements:

1. The decomposition of human waste in their toilets is initiated by fungal inoculum.
2. Ammonia and water vapor are the only end products in this decomposition which are released into the atmosphere.

Which of the statements given above is/are correct :

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

[I.A.S. (Pre) 2015]

 

26. Which of the following can be found as pollutants in the drinking water in some parts of India?

1. Arsenic
2. Sorbitol
3. Fluoride
4. Formaldehyde
5. Uranium

Select the correct answer using the codes given below :

(a) 1 and 3
(b) 2, 4 and 5
(c) 1, 3 and 5
(d) All of these

[I.A.S. (Pre) 2013]

 

27. “Knock-Knee Syndrome” is caused by the pollution of

(a) Mercury
(b) Lead
(c) Arsenic
(d) Fluoride

[U.P.P.C.S. (Mains) 2016]

 

28. Which pollution is responsible for ‘Knock-KneeSyndrome”?

(a) Fluoride
(b) Mercury
(c) Arsenic
(d) Cadmium

[M.P.P.C.S. (Pre) 2019]

 

29. The acidification of oceans is increasing. Why is this phenomenon a cause of concern?

1. The growth and survival of calcareous phytoplankton will be adversely affected.
2. The growth and survival of coral reefs will be adversely affected.
3. The survival of some animals that have phytoplankton larvae will be adversely affected.
4. The cloud seeding and formation of clouds will be adversely affected.

Which of the statement(s) given above is/are correct?

(a) 1, 2 and 3
(b) Only 2
(c) 1 and 3
(d) 1, 2, 3 and 4

[I.A.S. (Pre) 2012]

 

30. Euro emission norms are emission standards and these represent a package setting limits for emission from a vehicle. Which of the following gases is covered under this?

(a) Carbon monoxide
(b) Hydrocarbons
(c) Lead
(d) All of the above

[U.P.P.C.S.(Pre) 2013]

 

31. To meet Euro-II emission standards, what should be the sulphur content in the ultra-low sulphur diesel?

(a) 0.05 percent or less than this
(b) 0.10 percent
(c) 0.15 percent
(d) 0.20 percent

[U.P.P.C.S.(Pre) 2013]

 

32. Euro Norms place limits on the amount of emission of gas in automobiles. The gas is:

(a) Carbon dioxide
(b) Carbon monoxide
(c) Nitrogen
(d) Methane

[R.A.S./R.T.S.(Pre) 1999]

 

33. In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of the Air Quality Index?

1. Carbon dioxide
2. Carbon monoxide
3. Nitrogen dioxide
4. Sulfur dioxide
5. Methane

Select the correct answer using the codes given below:

(a) 1, 2 and 3 only
(b) 2, 3 and 4 only
(c) 1, 4 and 5 only
(d) 1, 2, 3, 4 and 5

[I.A.S. (Pre) 2016]

 

34. National Clean Air Programme was launched by the Central Government in the year :

(a) 2018
(b) 2017
(c) 2020
(d) 2019

[U.P.P.C.S (Pre) 2020]

 

35. Carbon monoxide, emitted by vehicles which turned to carbon dioxide by the catalyst converter, whose ceramic disc is controlled by?

(a) Silver
(b) Gold
(c) Copper
(d) Palladium

[R.A.S./R.T.S.(Pre) 1994]

 

36. Consider the following statement :

Assertion (A): Soil pollution is more dangerous as compared to industrial pollution.
Reason (R): Fertilizers and pesticides enter into the food cycle.

Choose the correct answer from the codes given:

Codes :

(a) Both (A) and (R) are true and (R) is the correct explanation of (A)
(b) Both (A) and (R) are true but (R) is not the correct explanation of (A)
(c) (A) is true but (R) is false
(d) (A) is false but (R) is true

[U.P.P.S.C. (GIC) 2010]

 

37. Which megacity of India generates the largest solid waste per capita annually?

(a) Bangalore
(b) Chennai
(c) Delhi
(d) Mumbai

[U.P.P.C.S (Pre) 2010]

 

38. Brominated flame retardants are used in many household products like mattresses and upholstery.
Why is there some concern about their use?

1. They are highly resistant to degradation in the environment.
2. They can accumulate in humans and animals.

Select the correct answer using the codes given below.

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

[I.A.S. (Pre) 2014]

 

39. Consider the following statements:

1. Agricultural soils release nitrogen oxides into the environment.
2. Cattle release ammonia into the environment.
3. Poultry industry releases reactive nitrogen compounds into the environment.

Which of the statements given above is/are correct?

(a) 1 and 3 only
(b) 2 and 3 only
(c) 2 only
(d) 1, 2 and 3

[I.A.S. (Pre) 2019]

 

40. What is the importance of crop rotation in farming?

(a) It increases the production
(b) Soil fertility is conserved
(c) Soil erosion is reduced
(d) All the above

[U.P.R.O./A.R.O. (Mains) 2016]

 

41. There are some concerns regarding the nanoparticles of some chemical elements that are used by the industry in the manufacture of various products. Why?

1. They can accumulate in the environment, and contaminate water and soil.
2. They can enter food chains.
3. They can trigger the production of free radicals.

Select the correct answer using the codes given below.

(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

[I.A.S. (Pre) 2014]