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Which of the following compounds gives b...

Which of the following compounds gives blood red colouration when its Lassaigne's extract is treated with alkali and ferric chloride .

A

Thiourea

B

Diphenyl sulphide

C

Phenylhydrazine

D

Benzamide

Text Solution

Verified by Experts

The correct Answer is:
A
Thiourea contains both N and S and hence gives blood colourtion when its Lassigne's extract is heated with `FeCl_(3)`
`3NaCNS + FeCl_(3)rarr Fe(CNS)_(3)+3 NaCl`
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