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Question

Which of the following compounds are primary constituents of acid rain?

I. Sulphuric acid
II. Acetic acid
III. Nitric acid

A
I, II and III
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B
I and III
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C
Only II
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D
I and II
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Solution

The correct option is B I and III
Any form of precipitation containing acidic components that falls to the ground in wet (rain, fog, snow) or dry (acidic gases and chemicals blown by wind) forms is referred to as acid rain.

When pollutants such as oxides of nitrogen and sulphur dioxide (SO2) are added in large concentrations to the air, they react with oxygen, atmospheric water vapour and other chemicals to form acids such as nitric acid and sulphuric acid. These acids mix with rain water or other substances and eventually fall on to the ground in wet or dry forms.

Thus, primary constituents of acid rain are nitric acid and sulphuric acid.

Acetic acid is an organic acid that is primarily found in fruits.

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