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Which gas is primarily responsible for acid rain?
- CO₂
- SO₂
- CH₄
- N₂
Answer: SO₂
SO₂ and NOₓ from industries/vehicles react with atmospheric water to form H₂SO₄ and HNO₃, causing acid rain (pH < 5.6). Damages monuments, ecosystems, health. [[NCERT Chemistry Class 11, CPCB Reports]]