1
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The value of enthalpy change $$(\Delta H)$$ for the reaction $$\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}(l)+3 \mathrm{O}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{CO}_2(\mathrm{~g})+ 3 \mathrm{H}_2 \mathrm{O}(l)$$, at $$27^{\circ} \mathrm{C}$$ is $$-1366 \cdot 5 \mathrm{~kJ} \mathrm{~mol}^{-1}$$. The value of internal energy change for the above reaction at this temperature will be

A
$$-1371.5~\mathrm{kJ~mol^{-1}}$$
B
$$-1369.0~\mathrm{kJ~mol^{-1}}$$
C
$$-1364.0~\mathrm{kJ~mol^{-1}}$$
D
$$-1361.5~\mathrm{kJ~mol^{-1}}$$
2
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

Standard entropy of X2, Y2 and XY3 are 60, 40 and 50 JK$$-$$1mol$$-$$1, respectively. For the reaction, $$\frac{1}{2}$$X2 + $$\frac{3}{2}$$Y2 $$\to$$ XY3, $$\Delta$$H = $$-$$30 kJ, to be at equilibrium, the temperature will be

A
1250 K
B
500 K
C
750 K
D
1000 K
3
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

In an adiabatic process, no transfer of heat takes place between system and surrounding. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following.

A
q = 0, $$\Delta$$T $$\ne$$ 0, W = 0
B
q $$\ne$$ 0, $$\Delta$$T = 0, W = 0
C
q = 0, $$\Delta$$T = 0, W = 0
D
q = 0, $$\Delta$$T < 0, W $$\ne$$ 0
4
BITSAT 2021
MCQ (Single Correct Answer)
+3
-1

SI unit of Boltzmann's constant is

A
JK$$-$$1
B
eVK$$-$$1
C
erg K$$-$$1
D
JK
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