Acid rains are produced by :

Chemistry Enviromental Chemistry ( Not In Syllabus ) Gaseous Air Pollutants Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

excess NO 2 and SO 2 from burning fossil fuels

excess production of NH 3 by industry and coal gas

excess release of carbon monoxide by incomplete combustion

excess formation of CO 2 by combustion and animal respiration.

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The correct answer is:

When fossil fuel burnt in automobile engines different oxides like NO, NO 2 , SO 2 , SO 3 are produced. In the presence of moisture these oxides convert in the acids. THese acids comes down from the atmosphere in the form of rain, called acid rain.

S (from fossil fuel) + O 2 SO 2

SO 2 + O 3 SO 3 + O 2

SO 2 + H 2 O 2 H 2 SO 4

SO 3 + H 2 O H 2 SO 4

2NO 2 + H 2 O HNO 3 + HNO 2

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