Question

Match List-I with List-II

	List-I		List-II
A	Nitrogen oxides in air	I	Eutrophication
B	Methane in air	II	pH of rain water becomes 5.6
C	Carbon dioxide	III	Global warming
D	Phosphate fertilisers in water	IV	Acid rain

Choose the correct answer from the options given below:

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-III, C-I, D-IV
• C. A-IV, B-III, C-II, D-I
• D. A-IV, B-II, C-III, D-I

Answer 1

The Correct Option is C

Solution:
We need to match the items in List-I with their corresponding descriptions in List-II.

Let's analyze each item:

A. Nitrogen oxides in air
Nitrogen oxides (NOx) contribute to acid rain. They react with water and oxygen in the atmosphere to form nitric acid (HNO₃), which lowers the pH of rainwater.
Therefore, A matches with IV (Acid rain).

B. Methane in air
Methane (CH₄) is a potent greenhouse gas that contributes to global warming by trapping heat in the atmosphere.
Therefore, B matches with III (Global warming).

C. Carbon dioxide
Carbon dioxide (CO₂) is a major greenhouse gas that contributes to global warming. It also causes the pH of rain water to be 5.6 because of the reaction with water.
Therefore, C matches with II (pH of rain water becomes 5.6).

D. Phosphate fertilisers in water
Phosphate fertilizers in water bodies can lead to excessive algal growth, causing eutrophication, which depletes oxygen and harms aquatic life.
Therefore, D matches with I (Eutrophication).

Matching:
A - IV (Acid rain)
B - III (Global warming)
C - II (pH of rain water becomes 5.6)
D - I (Eutrophication)

Correct Answer: A-IV, B-III, C-II, D-I