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Lassaigne’s extract is heated with cone....

Lassaigne’s extract is heated with cone. `HNO_(3)` before testing for halogens because 

A

silver halides are insoluble in `HNO_(3)`

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
See detection of nitrogen.
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