MCQ
If $N$ and $S$ are present in an organic compound during Lassaigne test, then both changes into
- A$N{a_2}S$ and $NaCN$
- ✓$NaSCN$
- C$N{a_2}S{O_3}$ and $NaCN$
- D$N{a_2}S$ and $NaCNO$
✓
Answer
Correct option: B.
$NaSCN$
b
(b) When sulphur and nitrogen both are present in organic compound during Lassaigne's Test, both changes into "sodium thiocyanate". $(NaSCN)$ which gives a blood red colouration with Ferric ion.
(b) When sulphur and nitrogen both are present in organic compound during Lassaigne's Test, both changes into "sodium thiocyanate". $(NaSCN)$ which gives a blood red colouration with Ferric ion.
$3NaCNS + FeC{l_3} \to \mathop {\mathop {Fe{{(CNS)}_3}}\limits_{{\rm{Ferric sulpho cyanide}}} }\limits_{{\rm{(Blood red colour)}}} + 3NaCl$
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