1
IAT (IISER) 2023
MCQ (Single Correct Answer)
+4
-1
Consider the following reaction: $\mathrm{CH}_4(\mathrm{~g}) \rightarrow \mathrm{C}(\mathrm{g})+4 \mathrm{H}(\mathrm{g}) ; \Delta_a H^0=1665 \mathrm{kJmol}^{-} 1$ Which of the statements is FALSE?
A
$\Delta_a H^0$ is the mean bond enthalpy of a C-H bond.
B
All four $\mathrm{C}-\mathrm{H}$ bonds in $\mathrm{CH}_4$ are identical in bond length and energy.
C
The energy required to break individual $\mathrm{C}-\mathrm{H}$ bonds in successive steps is different.
D
Mean C-H bond enthalpies differ slightly from compound to compound
2
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
What is the correct relation between the heat capacity at constant volume $\left(C_v\right)$ and heat capacity at constant pressure $\left(C_p\right)$ for an ideal gas? ( $R=$ Universal gas constant)
A
$C_v+C_p=2 R$
B
$C_P-C_V=R$
C
$C_v-C_p=2 R$
D
$C_v+C_p=R$
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