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Assertion : During test for nitrogen wit...

Assertion `:` During test for nitrogen with Lassaigne extract on adding `FeCl_(3)` solution sometimes a red precipitate is obtained.
Reason `:` Sulphur is also present.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A
On adding `FeCl_(3)` solution to sodium extract during testing for nitrogen a red precipitate is obtained. It is due to the presence of sulphur also.
`3NaCNS + FeCl_(3) to underset("Red colour")(Fe(CNS)_(3)) + 3NaCl`
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