Question

In a gas at STP, if n is the number density of the molecules and r is the radius of the molecule, then the mean free path of the molecule is inversely proportional to

• A. nr2
• B. nr
• C. n2r
• D. $\sqrt nr$
• E. $\sqrt{nr}$

Answer 1

Answer: (A)

nr2

Answer 2

The correct option is (A) : nr2