1
NEET 2023 Manipur
+4
-1

Consider the following reaction :-

$$2 \mathrm{H}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{H}_2 \mathrm{O}(\mathrm{g}) \Delta_{\mathrm{r}} \mathrm{H}^{\circ}=-483.64 \mathrm{~kJ} \text {. }$$

What is the enthalpy change for decomposition of one mole of water? (Choose the right option).

A
120.9 kJ
B
241.82 kJ
C
18 kJ
D
100 kJ
2
NEET 2023
+4
-1

The equilibrium concentrations of the species in the reaction $$\mathrm{A}+\mathrm{B} \rightleftharpoons \mathrm{C}+\mathrm{D}$$ are $$2,3,10$$ and $$6 \mathrm{~mol}$$ $$\mathrm{L}^{-1}$$, respectively at $$300 \mathrm{~K} . \Delta \mathrm{G}^{0}$$ for the reaction is $$(\mathrm{R}=2 \mathrm{cal} / \mathrm{mol} ~\mathrm{K})$$

A
$$-137.26 ~\mathrm{cal}$$
B
$$-1381.80 ~\mathrm{cal}$$
C
$$-13.73 ~\mathrm{cal}$$
D
$$1372.60 ~\mathrm{cal}$$
3
NEET 2023
+4
-1

Which amongst the following options is the correct relation between change in enthalpy and change in internal energy?

A
$$\Delta \mathrm{H}=\Delta \mathrm{U}+\Delta \mathrm{n_g R T}$$
B
$$\Delta \mathrm{H}-\Delta \mathrm{U}=-\Delta \mathrm{nRT}$$
C
$$\Delta \mathrm{H}+\Delta \mathrm{U}=\Delta \mathrm{nR}$$
D
$$\Delta \mathrm{H}=\Delta \mathrm{U}-\Delta \mathrm{n_g R T}$$
4
NEET 2022 Phase 2
+4
-1

One mole of an ideal gas at 300 K is expanded isothermally from 1 L to 10 L volume. $$\Delta$$U for this process is :

(Use R = 8.314 J k$$-$$1 mol$$-$$1)

A
0 J
B
1260 J
C
2520 J
D
5040 J
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Mechanics
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