Question

Dilute nitric acid is used to test the presence of ______​

Answer 1

Answer:

Diphenylamine may be used as a wet chemical test for the presence of the nitrate ion. In this test, a solution of diphenylamine and ammonium chloride in sulfuric acid is used. In the presence of nitrates, diphenylamine is oxidized, giving a blue coloration.

Answer 2

Answer:

$\boxed{Starch\;}$

Explanation:

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