| Column $I$ | Column $II$ |
| $A$. $CO_{2(s)} \rightarrow CO_{2(g)}$ | $p$. phase transition |
| $B$. $CaCO_{3(s)} \rightarrow CaO_{(s)} + CO_{2(g)}$ | $q$. allotropic change |
| $C$. $2H_{(g)} \rightarrow H_{2(g)}$ | $r$. $\Delta H$ is positive |
| $D$. $P_{(\text{white, solid})} \rightarrow P_{(\text{red, solid})}$ | $s$. $\Delta S$ is positive |
| $t$. $\Delta S$ is negative |
Explore More
| Column $I$ | Column $II$ |
| $A$. Freezing of water at $273 \ K$ and $1 \ atm$ | $P$. $q=0$ |
| $B$. Expansion of $1 \ mol$ of an ideal gas into a vacuum under isolated conditions | $Q$. $w=0$ |
| $C$. Mixing of equal volumes of two ideal gases at constant temperature and pressure in an isolated container | $R$. $\Delta S_{sys} < 0$ |
| $D$. Reversible heating of $H_{2(g)}$ at $1 \ atm$ from $300 \ K$ to $600 \ K$,followed by reversible cooling to $300 \ K$ at $1 \ atm$ | $S$. $\Delta U=0$ |
| $T$. $\Delta G=0$ |
| Compound | $\Delta_f H^\circ$ $(kJ \ mol^{-1})$ | $S^\circ$ $(J \ mol^{-1} \ K^{-1})$ |
|---|---|---|
| $XY(g)$ | $42$ | $200$ |
| $X_2(g)$ | $8$ | $140$ |
| $Y_2(g)$ | $80$ | $250$ |
Vedclass Products
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialGenerate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeLive online exams with unlimited students, 360° analytics & white-label branding.
See Demo