1
MHT CET 2025 26th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the thermodynamic processes, which of the following statements is NOT true?

A

In an isothermal process, the temperature remains constant.

B

In an adiabatic process, the system is insulated from surroundings.

C

In an isochoric process, pressure remains constant.

D

In an adiabatic process, $\mathrm{PV}^\gamma=$ constant.

2
MHT CET 2025 26th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

In case of free expansion, which one of the following statements is WRONG?

A
It is an instantaneous change.
B
The system is not in thermodynamic equilibrium.
C
Free expansion can be plotted on a P-V diagram.
D
It is an uncontrolled change.
3
MHT CET 2025 26th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

An ideal gas expands adiabatically, $(\gamma=1.5)$. To reduce the r.m.s. velocity of the molecules 4 times, the gas has to be expanded

A
256 times
B
128 times
C
64 times
D
8 times
4
MHT CET 2025 26th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

The temperature at which oxygen molecules will have same r.m.s. speed as helium molecules at $57^{\circ} \mathrm{C}$ is (molecular masses of oxygen and helium are 32 and 4 respectively.)

A
1320 K
B
2240 K
C
2640 K
D
3230 K

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