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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 the assertion and reason are true and reason is the true explanation of the assertion .

B

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

C

If the assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
a
On adding `FeCl_(3)` solution to sodium extract dueing testing for nitrogen a red precipitate is obtained. It is due to the presence of sulphur also.
`3NaCNS+FeCl_(3)rarr Fe(CNH)_(3)+3NaCl.`
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