Question

When the mixture of $[A+B+C]$ is dissolved in $NaHC{O}_3,$ A dissolve in $NaHC{O}_3,$ $BandC$ remains as a residue. After that residue dissolves in $aq.NaOH,C$ dissolves in it and $B$ remains as residue. $A,B,C$ can be respectively.

• A.
• B.
• C.
• D.

Answer 1

The correct option is A


$NaHC{O}_3$ is a mild base. So, a stronger acid (Benzoic acid) will be dissolved in it.
$NaOH$ is a strong base. So, a mild acid can be dissolved in it.
So, $p-Xylene$ remains insoluble.