Q33 / 180 · NEET 2019 (All India) · Botany

Which of the following pairs of gases is mainly responsible for green house effect?

  • A
    Ozone and Ammonia
  • B
    Oxygen and Nitrogen
  • C
    Nitrogen and Sulphur dioxide
  • Correct answer
    D
    Carbon dioxide and Methane

Solution

Greenhouse effect and global warming is a natural phenomenon responsible for heating of earth’s surface and atmosphere due to increase in the concentration of CO2 (64.3%), methane gas (17%) and N2O (6%) (greenhouse gases).

The surface of the earth re-emits heat in the form of infrared radiation but part of this does not reflect back due to greenhouse gases leads to the heating of the earth's atmosphere.

 Hence, the right option is 4 carbon dioxide and methane.

Hence, the correct answer is option: 'D'.

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