Question

Why is nitric acid collected by the distillation of a mixture of sodium nitrate and conc. Sulphuric

acid yellowish brown in colour?
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Answer 1

Answer:

Nitric acid prepared in the laboratory is yellow in colour due to the dissolution of reddish brown coloured nitrogen dioxide gas in acid. This gas is produced due to the thermal dissociation of a portion of nitric acid. ... Nitric acid cannot be concentrated beyond 68% by the distillation of dilute solution of HNO3.

Explanation:

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