Nitric acid is added to sodium fusion ex...

Nitric acid is added to sodium fusion extract and the solution is boiled before adding silver nitrate for testing halogens because

the extract is alkaline and thus must be neutralized.

intric acid decomposes sodium cyanide or sodium sulphide (if present) to hydrogen cyanide and hydrogen sulphide gases, respectively.

nitric acid oxidizes halogen to halide ion.

nitric acid dissolves silver nitrate.

Verified by Experts

The correct Answer is:

`NaCN + HNO_(3) rarr HCN + NaNO_(3)`
`Na_(2)S + HNO_(3) rarr H_(2)S + NaNO_(3)`

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

nitric acid

ammonia

hydrochloric acid

sodium hydroxide

Silver halides are soluble in `HNO_(3)`

`Na_(2)S and NaCN` are decomposed by `HNO_(3)`

`Ag_(2)S` is soluble in `HNO_(3)`

AgCN is soluble in `HNO_(3)`

Silver halides are soluble in `HNO_(3)`

`Na_(2)S` and `NaCN` are decomposed by `HNO_(3)`

`Ag_(2)S` is soluble in `HNO_(3)`

`AgCN` is soluble in `HNO_(3)`