1
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)
2
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.
3
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
4
JEE Main 2019 (Online) 12th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Enthalpy of sublimation of iodine is 24 cal g–1 at 200 oC. If specific heat of I2(s) and l2 (vap) are 0.055 and 0.031 cal g–1K –1 respectively, then enthalpy of sublimation of iodine at 250 oC in cal g–1 is :
A
2.85
B
22.8
C
11.4
D
5.7
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