1
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Five moles of an ideal gas at 1 bar and 298 K is expanded into vacuum to double the volume. The work done is :
A
Zero
B
-RT $$\ln {{{V_2}} \over {{V_1}}}$$
C
CV (T2 – T1)
D
– RT (V2 – V1)
2
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For one mole of an ideal gas, which of these statements must be true?
(a) U and H each depends only on temperature
(b) Compressibility factor z is not equal to 1
(c) CP, m – CV, m = R
(d) dU = CVdT for any process
A
(a), (c) and (d)
B
(a) and (c)
C
(c) and (d)
D
(b), (c) and (d)
3
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The true statement amongst the following is :
A
S is a function of temperature but $$\Delta $$S is not a function of temperature.
B
Both S and $$\Delta $$S are not functions of temperature.
C
Both $$\Delta $$S and S are functions of temperature.
D
S is not a function of temperature but $$\Delta $$S is a function of temperature.
4
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If enthalpy of atomisation for Br2(1) is x kJ/mol and bond enthalpy for Br2 is y kJ/mol, the relation between them :
A
does not exist
B
is x < y
C
is x > y
D
is x = y
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