Physics · PYQ NEET UG 2026

The mean free path of molecules in an ideal gas A is half that of another ideal gas B. The diameter of the spherical molecules of gas A is twice the diameter of the molecules of B. If number densities of the gases A and B are \( n_A \) and \( \nu_B \), respectively, then the correct option is :

1. A
   \( n_A = n_B \)
2. B
   \( n_A = 2n_B \)
3. C
   \( n_A = \frac{1}{4}n_B \)
4. D
   \( n_A = \frac{1}{2}n_B \)