Qualitative Analysis - Result Question 1
####1. An organic compound $X$ showing the following solubility profile is
(2019 Main, 8 April I)
(a) $o$-toluidine
(b) oleic acid
(c) $m$-cresol
(d) benzamide
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Answer:
Correct Answer: 1. (c)
Solution:
- $m$-cresol is the organic compound that shows the following solubility profile.
$m$-cresol on reaction with $10 \text{\%} NaOH$ forms 3-methyl sodiumphenoxide ion.
It does not react with $H _2 O, 5 \text{\%} HCl$ and $10 \text{\%} NaHCO _3$. Oleic acid $\left(C _{18} H _{34} O _2\right)$ is soluble in $10 \text{\%} NaOH$ and $10 \text{\%}$ $NaHCO _3$ due to the presence of $COOH$ group. Benzamide $\left(C _6 H _5 CNH _2\right)$ is insoluble in $5 \text{\%} HCl, 10 \text{\%} NaOH$ and $10 \text{\%} NaHCO _3$ due to the presence $-CONH _2$ group. o-toluidine is soluble in $5 \text{\%}$. $HCl$ due to presence of basic group $\left(-NH _2\right)$ attached to ring.
