31. Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction, as shown in the given scheme.\\
\includegraphics[max width=\textwidth, alt={}, center]{1235d492-3555-402b-9a20-f8b0c32f22a0-15_280_1493_828_221}\\
(A) $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { OH }$ and $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { COOH }$\\
(B) $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { COOH }$ and $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { CH } _ { 2 } \mathrm { OH }$\\
(C) $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { CH } _ { 2 } \mathrm { OH }$ and $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { OH }$\\
(D) $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { CH } _ { 2 } \mathrm { OH }$ and $\mathrm { C } _ { 6 } \mathrm { H } _ { 5 } \mathrm { CH } _ { 2 } \mathrm { COOH }$

\section*{ANSWER : BD}
\begin{enumerate}
  \setcounter{enumi}{31}
  \item Choose the correct reason(s) for the stability of the lyophobic colloidal particles.\\
(A) Preferential adsorption of ions on their surface from the solution\\
(B) Preferential adsorption of solvent on their surface from the solution\\
(C) Attraction between different particles having opposite charges on their surface\\
(D) Potential difference between the fixed layer and the diffused layer of opposite charges around the colloidal particles
\end{enumerate}

\section*{ANSWER : AD}
\begin{enumerate}
  \setcounter{enumi}{32}
  \item Which of the following molecules, in pure form, is (are) unstable at room temperature ?
\end{enumerate}

(A)\\
\includegraphics[alt={}]{smile-0dd9bca34ee658c7afc006b256b5dd9d4cb601f6}

(B)\\
\includegraphics[alt={}]{smile-18a4196be5b9f92a15e9cbdb6399634dda89fc7e}

(C)\\
\includegraphics[alt={}]{smile-737050fd8d833f820f49e37669ff4cb86237120d}

(D)\\
\includegraphics[alt={}]{smile-5d0869eabfb7251a3f6447078e4a415fa8eab8e3}

ANSWER : BC\\