1
JEE Main 2019 (Online) 10th April Morning Slot
+4
-1
A process will be spontaneous at all temperatures if :
A
$$\Delta$$H < 0 and $$\Delta$$S > 0
B
$$\Delta$$H < 0 and $$\Delta$$S < 0
C
$$\Delta$$H > 0 and $$\Delta$$S < 0
D
$$\Delta$$H > 0 and $$\Delta$$S > 0
2
JEE Main 2019 (Online) 9th April Evening Slot
+4
-1
During compression of a spring the work done is 10kJ and 2kJ escaped to the surroundings as heat. The change in internal energy, $$\Delta$$U(inkJ) is :
A
- 12
B
8
C
- 8
D
12
3
JEE Main 2019 (Online) 9th April Morning Slot
+4
-1
Among the following, the set of parameters that represents path function, is :
(A) q + w
(B) q
(C) w
(D) H–TS
A
(B) and (C)
B
(A) and (D)
C
(B), (C) and (D)
D
(A), (B) and (C)
4
JEE Main 2019 (Online) 8th April Evening Slot
+4
-1
5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200 K. If CV = 28 JK–1mol–1, calculate $$\Delta$$U and $$\Delta$$pV for this process. (R = 8.0 JK–1 mol–1]
A
$$\Delta$$U = 14 kJ; $$\Delta$$(pV) = 4 kJ
B
$$\Delta$$U = 2.8 kJ; $$\Delta$$(pV) = 0.8 kJ
C
$$\Delta$$U = 14 kJ; $$\Delta$$(pV) = 18 kJ
D
$$\Delta$$U = 14 kJ; $$\Delta$$(pV) = 0.8 kJ
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