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Which of the following compound will giv...

Which of the following compound will give blood red colour while doing the Lassaigne's test for N?

A

`(NH_(2))C= O`

B

`H_(2)N (C_(60H_(4)) SO_(3)H`

C

`C_(6)H_(5)SO_(3)H`

D

`CHCl_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
Compounds containing both N and S give blood red colour in Lassaigne.s test due to the formation of `Fe(SCN)_(2)`. Thus, `H_(2)N (C_(6)H_(4)) SO_(3)H` gives blood red colour in Lassaigne.s test of nitrogen.
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