Question

Which of the following
compounds will give blood
red colour while doing the
Lassaigne's test?
O
(NH,), CÓ
O
CH S03H
O
(NH,), CS
CHCI​

Answer 1

Answer:

NH_(2))_(2)C=O``H_(2)N(C_(6)H_(4))SO_(3)H``C_(6)H_(5)SO_(2)H``CHCl_(3)`

Solution : `H_(2)N (C_(6)H_(5))SO_(3)H` contains, N,S and C. During fusion with sodium metal, it will from NaCNS which gives a blood red colouration with `Fe^(3+)` ions.

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