Question:
Acid rain is caused by increase in the atmospheric concentration of
Acid rain is caused by increase in the atmospheric concentration of
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Acid rain is mainly due to sulphur dioxide and nitrogen oxides forming sulphuric and nitric acids in the atmosphere.
Updated On: May 27, 2026
- Ozone and dust
- \(SO_2\) and \(NO_2\)
- Carbon monoxide
- Nitrous oxide
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The Correct Option is B
Solution and Explanation
Acid rain is caused by acidic gases present in the atmosphere.
The main gases responsible are:
\[
SO_2
\]
and:
\[
NO_2.
\]
Sulphur dioxide reacts with oxygen and water vapour to form sulphuric acid:
\[
H_2SO_4.
\]
Nitrogen dioxide reacts with water and oxygen to form nitric acid:
\[
HNO_3.
\]
These acids dissolve in rainwater and fall as acid rain.
Carbon monoxide is toxic but is not the main cause of acid rain.
Ozone and dust are also not the main cause of acid rain.
Therefore, acid rain is caused by:
\[
SO_2\text{ and }NO_2.
\]
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