Match List-I (gas) with List-II (source/impact):

List I

i.Carbon dioxide

ii.Sulphur dioxide

iii.Sulphur oxide

iv.Nitrogen oxide

List II

a.Produced from automobile engines and reacts to make photochemical smog

b.Dangerous to humans at high concentrations and responsible for acid rain

c.From burning sulphur-containing compounds of fossil fuels in vehicles

d.Fossil fuel burning and deforestation

Ai-a, ii-c, iii-b, iv-d

Bi-d, ii-b, iii-c, iv-a

Ci-d, ii-c, iii-b, iv-a ✓ Correct

Di-a, ii-b, iii-c, iv-d

Correct answer: (C) i-d, ii-c, iii-b, iv-a

Explanation

Carbon dioxide is generated by fossil fuel burning and deforestation, the description that fits it.

Sulphur dioxide arises from burning the sulphur-bearing compounds present in vehicle fuels.

Sulphur oxide is dangerous to people at high concentrations and drives acid rain.

Nitrogen oxide comes from automobile engines and reacts to form photochemical smog.

The correct pairing links carbon dioxide to deforestation, the sulphur gases to fuel burning and acid rain, and nitrogen oxide to smog.

Both sulphur and nitrogen oxides combine with atmospheric moisture to produce acid rain.

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