Which of the following are commonly responsible for acid rain?
AN₂O and CO₂
BNO₂ and SO₂ ✓ Correct
CNH₃ and CH₄
DCO₂ and O₃
Correct answer: (B) NO₂ and SO₂
Explanation
Acid rain forms mainly from nitrogen dioxide and sulphur dioxide, which turn into nitric and sulphuric acids in the air.
Nitrous oxide with carbon dioxide does not produce the strong acids of acid rain.
Ammonia with methane are not the acidifying oxides responsible for acid rain.
Carbon dioxide with ozone only weakly acidify rain and are not the main cause.
Sulphur dioxide comes largely from coal burning while nitrogen oxides come from vehicles and power plants.
Acid rain lowers soil and lake pH, harming forests, fish and limestone buildings.
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