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

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Reaction of conc. HNO3 and conc. H2SO4

Reaction of conc. HCI and conc. H2SO4

Reaction of sodium nitrite with hydrochloric acid

Reaction with hydrochloric acid and nitric 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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