MCQ
If on adding $FeCl_3$ solution to acidified Lassaigne solution, of organic compound a blood redcolouration is producted, it indicates the presence of
- A$S$
- B$N$
- ✓$N$ and $S$
- D$S$ and $Cl$
✓
Answer
Correct option: C.
$N$ and $S$
c
$\mathrm{Na}+\mathrm{S}+\mathrm{C}+\mathrm{N} \rightarrow \mathrm{NaSCN} \quad \stackrel{\mathrm{Fe}^{+3}}{\longrightarrow}$ Blood red
$\mathrm{Na}+\mathrm{S}+\mathrm{C}+\mathrm{N} \rightarrow \mathrm{NaSCN} \quad \stackrel{\mathrm{Fe}^{+3}}{\longrightarrow}$ Blood red
colouration $[NCERT\,XI\,pg.\# \,355]$
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