Science & EnvironmentUPSC Prelims 2019 Detailed Analysis

Prelims 2019 Answer Key | Science & Environment | Part 1

Q.1)  Consider the following statements:

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

Which of these statements given above is/are correct?

a) 1 and 3 only

b) 2 and 3 only

c) 2 only

d) 1 , 2 and 3

 

Q.2) Consider the following:

  1. Carbon monoxide
  2. Methane
  3. Ozone
  4. Sulphur dioxide

Which of the above are released into atmosphere due to the burning of crop/biomass residue?

a) 1 and 2 only

b) 2, 3 and 4 only

c) 1 and 4 only

d) 1, 2, 3 and 4

Q.3) Which of the following statements are correct about the deposits of ‘methane hydrate’?

  1. Global Warming might trigger the release of methane gas from these deposits.
  2. Large deposits of ‘methane hydrate’ are formed in Arctic Tundra and under the seafloor.
  3. Methane in atmosphere oxidizes to carbon dioxide after a decade or two.

Select the correct answer using the codes given below.

a) 1 and 2 only

b) 2 and 3 only

c) 1 and 3 only

d) 1, 2 and 3 only

Q.4) Consider the following statements:

  1. Asiatic lion is naturally found in India only.
  2. Double-humped camel is naturally found in India only.
  3. One-horned rhinoceros is naturally found in India only.

Which of the statements given above is/are correct?

a) 1 only

b) 2 only

c) 1 and 3 only

d) 1, 2 and 3

Q.5) Consider the following statements:

The Environment Protection Act , 1986 empowers the Government of India to

  1. state the requirement of public participation in the process of environmental protection, and the procedure and manner in which it is sought
  1. lay down the standards for emission or discharge of environmental pollutants from various sources

Which of these statements given above is/are correct?

a) 1 only

b) 2 only

c) Both 1 and 2

d) Neither 1 nor 2

Q.6) Which of the following are in Agasthyamala biosphere Reserve?

a) Neyyar, Peppara and Shendurney wildlife Sanctuaries; and Kalakad Mundanthurai Tiger Reserve

b) Mudumalai, Sathyamangalam and Wayanad Wildlife Sanctuaries; and Silent Valley National Park

c) Kaundinya, Gundla Brahmeswaram and Papikonda wildlife Sanctuaries; and Mukurthi National Park

d) Kawal and Sri Venkateswara Wildlife Sanctuaries; and Nagarjunasagar-Srisailam tiger Reserve

Q.7) Consider the following statements:

  1. Some species of turtles are herbivores
  2. Some species of fish are herbivores
  3. Some species of marine mammals are herbivores
  4. Some species of snakes are viviparous

Which of the statements given above are correct?

a) 1 and 3 only

b) 2, 3 and 4 only

c) 2 and 4 only

d) 1, 2, 3 and 4

Q.8) Consider the following pairs

Wildlife Naturally Found in
1. Blue-finned Mahseer Cauvery River
2. Irrawaddy Dolphin Chambal  River
3. Rusty-spotted Cat Eastern Ghats

Which of the pairs given above are correctly matched?

a) 1 and 2 only

b) 2 and 3 only

c) 1 and 3 only

d) 1, 2 and 3

Q.9) 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

Q.10) In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehensions. These chemicals are used as

a) pesticides in agriculture

b) preservation in processed foods

c) fruit-ripening agents

d) moisturizing agents in cosmetics

 

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