Which one of the gases is responsible for causing acid rain in atmosphere?

S O_{2}

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C O_{2}

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C H_{4}

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O_{3}

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Solution

The correct option is A $S O_{2}$
When the pH of rain water drops below 5.6, it is called acid rain.
Acidic oxides of nitrogen and sulphur which are acidic in nature can be blown by wind to settle down on the ground as acid rain.
$S O_{2} (g) + O_{2} (g) + 2 H_{2} O (l) \to 2 H_{2} S O_{4} (a q)$
$4 N O_{2} (g) + O_{2} (g) + 2 H_{2} O (l) \to 4 H N O_{3} (a q)$

Hence, $N O_{2}$ and $S O_{2}$ are the major contributors to acid rain.

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Question 15
Name two gases which are mainly responsible for acid rain?

Name any two :

(a) natural sources of atmospheric polluction.

(b) gases which are responsible for the formation of acid rain.

Which of the following gases would be responsible for acid rain?

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