1
JEE Main 2024 (Online) 29th January Evening Shift
+4
-1

$$N$$ moles of a polyatomic gas $$(f=6)$$ must be mixed with two moles of a monoatomic gas so that the mixture behaves as a diatomic gas. The value of $$N$$ is :

A
6
B
2
C
4
D
3
2
JEE Main 2024 (Online) 29th January Morning Shift
+4
-1

A thermodynamic system is taken from an original state $$\mathrm{A}$$ to an intermediate state $$B$$ by a linear process as shown in the figure. It's volume is then reduced to the original value from $$\mathrm{B}$$ to $$\mathrm{C}$$ by an isobaric process. The total work done by the gas from $$A$$ to $$B$$ and $$B$$ to $$C$$ would be :

A
800 J
B
2200 J
C
33800 J
D
1200 J
3
JEE Main 2024 (Online) 29th January Morning Shift
+4
-1

Two vessels $$A$$ and $$B$$ are of the same size and are at same temperature. A contains $$1 \mathrm{~g}$$ of hydrogen and $$B$$ contains $$1 \mathrm{~g}$$ of oxygen. $$\mathrm{P}_{\mathrm{A}}$$ and $$\mathrm{P}_{\mathrm{B}}$$ are the pressures of the gases in $$\mathrm{A}$$ and $$\mathrm{B}$$ respectively, then $$\frac{P_A}{P_B}$$ is:

A
4
B
32
C
8
D
16
4
JEE Main 2024 (Online) 27th January Evening Shift
+4
-1

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio of $$\frac{\mathrm{Cp}}{\mathrm{Cv}}$$ for the gas is :

A
$$\frac{7}{5}$$
B
$$\frac{3}{2}$$
C
$$\frac{9}{7}$$
D
$$\frac{5}{3}$$
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