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Question

Acid rain is the downpour of
  1. carbon dioxide in rain
  2. sulphur dioxide in rain
  3. dust in rain
  4. oxygen in rain

A
oxygen in rain
B
carbon dioxide in rain
C
dust in rain
D
sulphur dioxide in rain
Solution
Verified by Toppr

The correct option is C sulphur dioxide in rain
When the pH of raindrops down below 5.5 it is called acid rain. It occurs because of oxides of sulphur (SO2) and nitrogen (NO) which on reacting with water in the atmosphere form sulphuric acid and nitric acid. These acids then come down on earth along with rain and thus, making the rain acidic. Hence, acid rain is the downpour of sulphur dioxide (SO2) and nitric oxide (NO).
So, the correct answer is 'sulphur dioxide in rain'.

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