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For the detection of sulphur by Lassaign...

For the detection of sulphur by Lassaigne's test, the addition of sodium nitroprusside to the sodium extract gives purple colouration. This is due to the formation of :

A

`Na_(3)[Fe(CN)_(6)]`

B

`Na_(4)[Fe(CN)_(5)NOS]`

C

`Fe(SCN)_(3)`

D

`Na_(4)[Fe(CN)_(6)]`

Text Solution

Verified by Experts

The correct Answer is:
B
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