If the number of molecules of SO2 (molecular weight =64 ) effusing through an orifice of unit area of cross-section in unit time at 0∘C and 1 atm pressure is n

Question

If the number of molecules of $SO _{2}$ (molecular weight $=64$ ) effusing through an orifice of unit area of cross-section in unit time at $0^{\circ} C$ and $1 atm$ pressure is $n$, the number of He molecules (atomic weight = 4) effusing under similar conditions at $273^{\circ} C$ and $0.25$ atm is :

(A) $\frac{n}{\sqrt{2}}$

(B) $n \sqrt{2}$

(C) $2 n$

(D) $\frac{n}{2}$

Answer 1

The number of He molecules effusing under similar conditions at $273^{\circ} C$ and $0.25$ atm is $\frac{n}{\sqrt{2}}$.

So, The correct option of this question is (A).