Question

The rate of diffusion of SO${}_3$, CO${}_2$, PCl${}_3$ and SO${}_2$ are in the following order:

• A. PCl${}_3$ > SO${}_3$ > SO${}_2$ > CO${}_2$
• B. CO${}_2$ > SO${}_2$ > PCl${}_3$ > SO${}_3$
• C. SO${}_2$ > SO${}_3$ > PCl${}_3$ > CO${}_2$
• D. CO${}_2$ > SO${}_2$ > SO${}_3$ > PCl${}_3$

Answer 1

Answer: (D)

CO${}_2$ > SO${}_2$ > SO${}_3$ > PCl${}_3$

As we know,
Rates of diffusion $\alpha$ $\frac{1}{\sqrt{MolarMass}}$ and according to increasing molar mass,
Rate of diffusion is:
CO${}_2$ > SO${}_2$ > SO${}_3$ > PCl${}_3$