Daily GS Foundation MCQs - SthaapnaEnvironment Previous Year QuestionsIAS Previous Year QuestionsStaapana - March 2019Sthaapana - March 2019 - Week 5

IAS Previous Year Environment Questions – Lecture – 8 – STHAAPNA Series

Consider the following statements about Chlorofluorocarbons, known as ozone-depleting substances, are used [2012]

  1. In the production of plastic foams
  2. In the production of tubeless tyres
  3. In cleaning certain electronic components
  4. As pressurizing agents in aerosol cans

Which of the statements given above is/are correct?

(a)1, 2 and 3 only

(b)4 only

(c) 1, 3 and 4 only

(d) 1, 2, 3 and 4

 

The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole ? [2011]

(a) Presence of prominent tropospheric turbulence and inflow of chlorofluorocarbons.

(b) Presence of prominent polar front and stratospheric clouds and inflow of chlorofluorocarbons.

(c) Absence of polar front and stratospheric clouds and inflow of methane and chlorofluorocarbons.

(d) Increased temperature at polar region due to global warming.

 

Due to their extensive rice cultivation, some regions may be contributing to global warming. To what possible reason/reasons is this attributable ? [2010]

  1. The anaerobic conditions associated with rice cultivation cause the emission of methane.
  2. When nitrogen based fertilizers are used, nitrous oxide is emitted from the cultivated soil.

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

 

The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs [2012]

(a) the water vapour of the air and retains its heat

(b) the ultraviolet part of the solar radiation

(c) all the solar radiations

(d) the infrared part of the solar radiation

 

Consider the following [2008]

1.Rice fields

2.Coal mining

  1. Domestic animals
  2. Wet lands

Which of the above are sources of methane, a major greenhouse gas?

(a)1 and 4 only

(b)2 and 3 only

(c) 1, 2 and 3 only

(d) 1, 2, 3 and 4

 

Which of the following statements best describes “carbon fertilization”? [2018]

a)Increased plant growth due to increased concentration of carbon dioxide in the atmosphere

b)Increased temperature of Earth due to increased concentration of carbon dioxide in the atmosphere

c)Increased acidity of oceans as a result of increased concentration of carbon dioxide in the atmosphere

d)Adaptation of all living beings on Earth to the climate change brought about by the increased concentration of carbon dioxide in the atmosphere

 

Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of [2011]

  1. its escape into the outer stratosphere.
  2. the photosynthesis by phytoplankton in the

oceans.

  1. the trapping of air in the polar ice caps.

Which of the statements given above is/are correct?

(a)1 and 2

(b)2 only

(c) 2 and 3

(d) 3 only

 

The acidification of oceans is increasing. Why is this phenomenon a cause of concern? [2012]

  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 phytoplanktonic larvae will be adversely affected.
  4. The cloud seeding and formation of clouds will be adversely affected.

Which of the statements given above is /are correct?

(a)1, 2 and 3 only

(b)2 only

(c) 1 and 3 only

(d) 1, 2, 3 and 4

 

Consider the following: [2010]

  1. Oxides of Hydrogen
  2. Oxides of Nitrogen
  3. Oxides of Sulphur

Which of the above causes/cause acid rain?

(a)1 and 2 only

(b)3 only

(c) 2 and 3 only

(d) 1, 2 and 3

 

Acid rain is caused by the pollution of environment by [2013]

(a) carbon dioxide and nitrogen

(b) carbon monoxide and carbon dioxide

(c) ozone and carbon dioxide

(d) nitrous oxide and sulphur dioxide

 

 

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