1
JEE Main 2020 (Online) 2nd September Morning Slot
+4
-1
A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. Assuming the gases to be ideal and the oxygen bond to be rigid, the total internal energy (in units of RT) of the mixture is :
A
11
B
20
C
15
D
13
2
JEE Main 2020 (Online) 9th January Evening Slot
+4
-1
Two gases-argon (atomic radius 0.07 nm, atomic weight 40) and xenon (atomic radius 0.1 nm, atomic weight 140) have the same number density and are at the same temperature. The raito of their respective mean free times is closest to :
A
2.3
B
1.83
C
4.67
D
3.67
3
JEE Main 2020 (Online) 9th January Morning Slot
+4
-1
Consider two ideal diatomic gases A and B at some temperature T. Molecules of the gas A are rigid, and have a mass m. Molecules of the gas B have an additional vibrational mode, and have a mass $${m \over 4}$$ . The ratio of the specific heats ($$C_V^A$$ and $$C_V^B$$ ) of gas A and B, respectively is :
A
7 : 9
B
5 : 7
C
3 : 5
D
5 : 9
4
JEE Main 2020 (Online) 9th January Morning Slot
+4
-1
Which of the following is an equivalent cyclic process corresponding to the thermodynamic cyclic given in the figure ? where, 1 $$\to$$ 2 is adiabatic.
(Graphs are schematic and are not to scale)
A
B
C
D
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