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Acid rain is caused mainly by ___________(a) methane gas(b) sulphuric acid(c) sulfur dioxide(d) carbon dioxideI got this question during an interview.I want to ask this question from Environmental Aspects of Power Generation in portion Steam Generators & Accessories of Energy Engineering

Answer»

Right choice is (c) sulfur dioxide

Easy EXPLANATION: ACID rain and acid snow are caused by mainly by sulfur dioxide and also oxides of nitrogen and other sulfur oxides contribute fewer amounts to it. These gasses carried ALONG wind currents combine with water molecules in the water vapor of the atmosphere, forming tiny DROPS. These drops when ENCOUNTERED by snow or rain producing clouds, results in acid rain.



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