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Q.

Which of the following method is used in the preparation of nitrous acid?

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a

Reaction of conc. HCI and conc. H2SO4

b

Reaction with hydrochloric acid and nitric acid

c

Reaction of conc. HNO3 and conc. H2SO4

d

Reaction of sodium nitrite with hydrochloric acid

answer is C.

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Detailed Solution

Nitrous acid is produced in the reaction mixture by the reaction of sodium nitrite with hydrochloric acid.

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