34. Which of the following hydrogen halides react(s) with $\mathrm { AgNO } _ { 3 } ( \mathrm { aq } )$ to give a precipitate that dissolves in $\mathrm { Na } _ { 2 } \mathrm {~S} _ { 2 } \mathrm { O } _ { 3 } ( \mathrm { aq } )$ ? (A) HCl (B) HF (C) HBr (D) HI
ANSWER : ACD
For an ideal gas, consider only $P$ - $V$ work in going from an initial state $X$ to the final state $Z$. The final state $\boldsymbol { Z }$ can be reached by either of the two paths shown in the figure. Which of the following choice(s) is (are) correct ? [take $\Delta S$ as change in entropy and $w$ as work done] [Figure] (A) $\Delta S _ { \mathrm { x } \rightarrow \mathrm { z } } = \Delta S _ { \mathrm { x } \rightarrow \mathrm { y } } + \Delta S _ { \mathrm { y } \rightarrow \mathrm { z } }$ (B) $w _ { \mathrm { x } \rightarrow \mathrm { z } } = w _ { \mathrm { x } \rightarrow \mathrm { y } } + w _ { \mathrm { y } \rightarrow \mathrm { z } }$ (C) $w _ { x \rightarrow y \rightarrow z } = w _ { x \rightarrow y }$ (D) $\Delta S _ { \mathrm { x } \rightarrow \mathrm { y } \rightarrow \mathrm { z } } = \Delta S _ { \mathrm { x } \rightarrow \mathrm { y } }$
ANSWER : AC
SECTION III : Integer Answer Type
This section contains $\mathbf { 5 }$ questions. The answer to each question is a single digit integer, ranging from 0 to 9 (both inclusive).
Which of the following molecules, in pure form, is (are) unstable at room temperature?
34. Which of the following hydrogen halides react(s) with $\mathrm { AgNO } _ { 3 } ( \mathrm { aq } )$ to give a precipitate that dissolves in $\mathrm { Na } _ { 2 } \mathrm {~S} _ { 2 } \mathrm { O } _ { 3 } ( \mathrm { aq } )$ ?\\
(A) HCl\\
(B) HF\\
(C) HBr\\
(D) HI
\section*{ANSWER : ACD}
\begin{enumerate}
\setcounter{enumi}{34}
\item For an ideal gas, consider only $P$ - $V$ work in going from an initial state $X$ to the final state $Z$. The final state $\boldsymbol { Z }$ can be reached by either of the two paths shown in the figure. Which of the following choice(s) is (are) correct ? [take $\Delta S$ as change in entropy and $w$ as work done]\\
\includegraphics[max width=\textwidth, alt={}, center]{1235d492-3555-402b-9a20-f8b0c32f22a0-16_617_719_993_298}\\
(A) $\Delta S _ { \mathrm { x } \rightarrow \mathrm { z } } = \Delta S _ { \mathrm { x } \rightarrow \mathrm { y } } + \Delta S _ { \mathrm { y } \rightarrow \mathrm { z } }$\\
(B) $w _ { \mathrm { x } \rightarrow \mathrm { z } } = w _ { \mathrm { x } \rightarrow \mathrm { y } } + w _ { \mathrm { y } \rightarrow \mathrm { z } }$\\
(C) $w _ { x \rightarrow y \rightarrow z } = w _ { x \rightarrow y }$\\
(D) $\Delta S _ { \mathrm { x } \rightarrow \mathrm { y } \rightarrow \mathrm { z } } = \Delta S _ { \mathrm { x } \rightarrow \mathrm { y } }$
\end{enumerate}
\section*{ANSWER : AC}
\section*{SECTION III : Integer Answer Type}
This section contains $\mathbf { 5 }$ questions. The answer to each question is a single digit integer, ranging from 0 to 9 (both inclusive).\\