Question

The loss in pressure of a real gas due to intermolecular attraction is

• A. inversely proportional to square root of molar volume
• B. directly proportional to square of number of mole
• C. directly proportional to number of molecules per unit volume of vessel
• D. directly proportional to number of molecules striking the side of the vessel per unit time

Answer 1

Answer: (B), (C), (D)

The correct options are
B directly proportional to square of number of mole
C directly proportional to number of molecules per unit volume of vessel
D directly proportional to number of molecules striking the side of the vessel per unit time

From real gas equation, it can be seen that loss in pressure $=\frac{n^{2}a}{V^2}$

loss in pressure of a real gas due to intermolecular attraction is inversely proportional to square of molar volume. Option A is inocrrect.

And directly proportional to square of number of moles.
Option B is correct.

The attractive force exerted on a single molecule about to strike the wall is proportional to the number of molecules per unit volume in the bulk of the gas. Option C is correct.
Since, no. of molecules striking the wall is also directly proportional to the no. of molecules per unit volume of vessel. Hence, loss in pressure is directly proportional to number of molecules striking the side of the vessel per unit time. Option D is correct.

Option B, C and D are correct.