Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

Question

Aicharya · Accepted Answer

For testing of halogens, Nitric acid is added to the sodium extract because if ${CN}^{-}$ or $S^{2 -}$ are present then they will be oxidised and removed before the test of halides.

NaCN + {HNO}_{3} \to {NaNO}_{3} + HCN ↑

{Na}_{2} S + {HNO}_{3} \to {NaNO}_{3} + H_{2} S ↑

Nilnic acid decomposed

NaCN & {Na}_{2} S

, else they precipitate in test & misquite the resolve

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing…

Solution