Chemistry
State how atmospheric nitrogen converts itself to nitric acid.
Nitric Acid
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Answer
During lightning discharge, nitrogen in the atmosphere reacts with oxygen to form nitric oxide which is further oxidised to nitrogen dioxide.
2NO + O2⟶ 2NO2
The nitrogen dioxide dissolves in atmospheric moisture and in the presence of oxygen of the air forming nitric acid in the free state.
4NO2 + 2H2O + O2 ⟶ 4HNO3
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Related Questions
State one relevant reason for the following : Concentrated nitric acid appears yellow, when it is left for a while in a glass bottle.
Match the gas given in column I to the identification of the gases mentioned in column II:
Column I Column II Nitric acid A. Turns acidified potassium dichromate solution green. B. Turns lime water milky, C. Turns reddish brown when it reacts with oxygen. D. Turns moist lead acetate paper silvery black. Give a word equation and balanced molecular equation for the laboratory preparation of nitric acid from :
(i) KNO3
(ii) NaNO3.
In the laboratory preparation of nitric acid from – KNO3 or NaNO3 state :
(i) the acid used
(ii) the type of apparatus used
(iii) the precautions to be taken during the preparation
(iv) the method of collection of the acid
(v) the method of identification of the product i.e., acid formed.