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Question

Nitrogen dioxide dissolves in atmospheric moisture or rainwater in the presence of oxygen to form_____.


A
N2O
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B
HNO3
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C
NO
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D
NO2
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Solution

The correct option is B HNO3

Nitrogen dioxide dissolves in atmospheric moisture or rainwater in the presence of oxygen to form nitric acid in the free state, which is washed down by the rain and combines with the salt present on the surface of the earth.

4NO2+2H2O+O24HNO3

The conversion of free atmospheric nitrogen into useful nitrogenous compounds in the soil is known as fixation of atmospheric nitrogen.


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