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A : Before testing of halogens, sodium e...

A : Before testing of halogens, sodium extract must be boiled with concentrated `HNO_(3)` R: Concentrated `HNO_(3)` destroy `CN`^(-)` and `S^(-)` by oxidation.

A

If both Assertion’ & Reason are true and the reason is the correct explanation of the assertion, then mark'(1).

B

If both Assertion. & Reason are true but the reason is not the correct explanation of the ’ assertion, then mark (2).

C

If Assertion is true statement but Reason is false, then mark (3). .

D

If both Assertion and-Reason are false statements, then mark (4)

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