ENVIRONMENT SCIENCE PRELIMS PYQ

ENVIRONMENT SCIENCE PRELIMS PYQ

2022
Q 1.Among the following crops, which one is the most important anthropogenic source of both methane and nitrous oxide ?

(a) Cotton

(b) Rice

(c) Sugarcane

(d) Wheat

Q 2.”System of Rice Intensification” of cultivation, in which alternate wetting and drying of rice fields is practised, results in :

(1) Reduced seed requirement

(2) Reduced methane production

(3) Reduced electricity consumption

Select the correct answer using the code given below:

(a) 1 and 2 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Q 3.Which one of the following lakes of West Africa has become dry and turned into a desert?

(a) Lake Victoria

(b) Lake Faguibine

(c) Lake Oguta

(d) Lake Volta

Q 4.Consider the following pairs :

Wetland/Lake Location

  1. Hokera Wetland – Punjab
  2. Renuka Wetland – Himachal Pradesh
  3. Rudrasagar Lake – Tripura
  4. Sasthamkotta – Tamil Nadu Lake

How many pairs given above are correctly matched ?

(a) Only one pair

(b) Only two pairs

(c) Only three pairs

(d) All four pairs

Q 5.“Climate Action Tracker” which emission reduction pledges of different countries is a :

(a) Database created by coalition of research organisations

(b) Wing of “International Panel of Climate Change”

(c) Committee under “United Nations Framework Convention on Climate Change”

(d) Agency promoted and financed by the United Nations Environment Programme and World Bank.

Q 6.Consider the following statements :

1.”The Climate Group” is an international non-profit organization that drives climate action by building large networks and running them.

2.The International Energy Agency in partnership with the Climate Group launched a global initiative “EP100”.

3.EP100 brings together leading companies committed to driving innovation in energy efficiency and increasing competitiveness while delivering on emission reduction goals.

4.Some Indian companies are members of EP100.

5.The International Energy Agency is the Secretariat to the “Under2 Coalition”.

Which of the statements given above are correct ?

(a) 1, 2, 4 and 5

(b) 1, 3 and 4 only

(c) 2,3 and 5 only

(d) 1, 2, 3, 4 and 5

Q 7.”If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys.” Which one of the following functions of wetlands best reflects the above statement ?

(a) The water cycle in wetlands involves surface runoff, subsoil percolation and evaporation.

(b) Algae form the nutrient base upon which fish, crustaceans, molluscs, birds, reptiles and mammals thrive.

(c) Wetlands play a vital role in maintaining sedimentation balance and soil stabilization.

(d) Aquatic plants absorb heavy metals and excess nutrients.

Q 8.In the context of WHO Air Quality Guidelines, consider the following statements :

1.The 24-hour mean of PM2.5 should not exceed 15 ug/m3 and annual mean of PM2.5 should not exceed 5 ug/m3.

2.In a year, the highest levels of ozone pollution occur during the periods of inclement weather.

  1. PM10 can penetrate the lung barrier and enter the bloodstream.
  2. Excessive ozone in the air can trigger asthma.

Which of the statements given above are correct ?

(a) 1, 3 and 4

(b) 1 and 4 only

(c) 2, 3 and 4

(d) 1 and 2 only

  1. With reference to “Gucchi” sometimes mentioned in the news, consider the following statements:
  2. It is a fungus.
  3. It grows in some Himalayan forest areas.
  4. It is commercially cultivated in the Himalayan foothills of north-eastern India.

Which of the statements given above is/are

(a) 1 only

(b) 3 only

(c) 1 and 2

(d) 2 and 3

  1. With reference to polyethylene terephthalate, the use of which is so widespread in our daily lives, consider the following statements :
  2. Its fibres can be blended with wool and cotton fibres to reinforce their properties.
  3. Containers made of it can be used to store any alcoholic beverage.
  4. Bottles made of it can be recycled into other products.
  5. Articles made of it can be easily disposed of by incineration without causing greenhouse gas emissions.

Which of the statements given above are correct ?

(a) 1 and 3

(b) 2 and 4

(c) land 4

(d) 2 and 3

  1. Which of the following is not a bird ?

(a) Golden Mahseer

(b) Indian Nightjar

(c) Spoonbill

(d) White Ibis

  1. Which of the following are nitrogen-fixing plants ?
  2. Alfalfa
  3. Amaranth
  4. Chickpea
  5. Clover
  6. Purslane (Kulfa)
  7. Spinach

Select the correct answer using the code given below:

(a) 1, 3 and 4 only

(b) 1, 3, 5 and 6 only

(c) 2, 4, 5 and 6 only

(d) 1, 2, 4, 5 and 6

  1. “Biorock technology” is talked about in which one of the following situations ?

(a) Restoration of damaged coral reefs

(b) Development of building materials using plant residues

(c) Identification of areas for exploration/extraction of shale gas

(d) Providing salt licks for wild animals in forests/protected areas

  1. The “Miyawaki method” is well known for the:

(a) Promotion of commercial farming in arid and semi-arid areas

(b) Development of gardens using genetically modified flora

(c) Creation of mini forests in urban areas

(d) Harvesting wind energy on coastal areas and on sea surfaces

  1. Which one of the following has been constituted under the Environment (Protection) Act, 1986?

(a) Central Water Commission

(b) Central Ground Water Board

(c) Central Ground Water. Authority

(d) National Water Development Agency

  1. Which one of the following best describes the term “greenwashing”?

(a) Conveying a false impression that a company’s products are eco-friendly and environmentally sound

(b) Non-inclusion of ecological/ environmental costs in the Annual Financial Statements of a country

(c) Ignoring the disastrous ecological consequences while undertaking infrastructure development

(d) Making mandatory provisions for environmental costs in a government project/programme

  1. Consider the following statements:
  2. High clouds primarily reflect solar radiation and cool the surface of the Earth.
  3. Low clouds have a high absorption of infrared radiation emanating from the Earth’s surface and thus cause a warming effect.

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

  1. Consider the following statements:
  2. Gujarat has the largest solar park in India.
  3. Kerala has a fully solar powered International Airport.
  4. Goa has the largest floating solar photovoltaic project in India.

Which of the statements given above is/are correct?

(a) 1 and 2

(b) 2 only

(c) land 3

(d) 3 only

  1. With reference to Indian laws about wildlife protection, consider the following statements :
  2. Wild animals are the sole property of the government.
  3. When a wild animal is declared protected, such animal is entitled for equal protection whether it is found in protected areas or outside.
  4. Apprehension of a protected wild animal becoming a danger to human life is sufficient ground for its capture or killing.

Which of the statements given above is/are correct?

(a) 1 and 2

(b) 2 only

(c) 1 and 3

(d) 3 only

  1. Certain species of which one of the following organisms are well known as cultivators of fungi?

(a) Ant

(b) Cockroach

(c) Crab

(d) Spider

  1. Consider the following statements:
  2. Other than those made by humans, nanoparticles do not exist in nature.
  3. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics
  4. Nanoparticles of some commercial products which enter the environment are unsafe for humans.

Which of the statements given above is/are correct?

(a) 1 only

(b) 3 only

(c) 1 and 2

(d) 2 and 3

  1. Consider the following;
  2. Carbon monoxide
  3. Nitrogen oxide
  4. Ozone
  5. Sulphur dioxide

Excess of which of the above in the environment is/are the cause(s) of acid rain?

(a) 1,2 and 3

(b) 2 and 4 only

(c) 4 only

(d) 1,3 and 4

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