1
MHT CET 2023 9th May Morning Shift
+1
-0

According to kinetic theory of gases, which one of the following statements is wrong?

A
All the molecules of a gas are identical.
B
Collisions between the molecules of a gas and that of the molecules with the walls of the container are perfectly elastic.
C
The molecules do not exert appreciable force on one another except during collision.
D
The pressure exerted by a gas is due to the collision between the molecules of the gas.
2
MHT CET 2021 21th September Evening Shift
+1
-0

What is the ratio of the velocity of sound in hydrogen $$\left(\gamma=\frac{7}{5}\right)$$ to that in helium $$\left(\gamma=\frac{5}{3}\right)$$ at the same temperature? (Molecular weight of hydrogen and helium is 2 and 4 respectively.)

A
$$\frac{\sqrt{42}}{5}$$
B
$$\frac{5}{\sqrt{42}}$$
C
$$\frac{\sqrt{21}}{5}$$
D
$$\frac{5}{\sqrt{21}}$$
3
MHT CET 2021 21th September Evening Shift
+1
-0

Equal volumes of two gases are kept in different containers having densities in the ratio 1 : 16. They exert equal pressures on the wall of their respective containers. Then the ratio of their r.m.s. velocities is

A
16 : 1
B
1 : 8
C
4 : 1
D
1 : 12
4
MHT CET 2021 21th September Evening Shift
+1
-0

In thermodynamics, for an isochoric process, which one of the following statement is INCORRECT?

A
Energy exchanged is used to do work and also to change internal energy.
B
No work is done in the process.
C
It is a constant volume process.
D
Temperature of the system changes during the process.
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Calculus
Coordinate Geometry
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