1
BITSAT 2022
+3
-1

Standard entropy of X2, Y2 and XY2 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
2
BITSAT 2022
+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
3
BITSAT 2021
+3
-1

SI unit of Boltzmann's constant is

A
JK$$-$$1
B
eVK$$-$$1
C
erg K$$-$$1
D
JK
4
BITSAT 2021
+3
-1

For the complete combustion of ethanol, $${C_2}{H_5}OH(I) + 3{O_2}(g) \to 2C{O_2}(g) + 3{H_2}O(I)$$, the amount of heat produced as measured in bomb calorimeter is 1364.47 kJ mol$$-$$1 at 25$$^\circ$$C. Assuming ideality the enthalpy of combustion, $$\Delta$$HC, for the reaction will be (R = 8.314 JK$$-$$1 mol$$-$$1)

A
$$-$$ 1366.95 kJ mol$$-$$1
B
$$-$$1361.95 kJ mol$$-$$1
C
$$-$$ 1460.50 kJ mol$$-$$1
D
$$-$$ 1350.50 kJ mol$$-$$1
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