Question

Five grams each of the following gases at $HCl$ and 750 mm pressure are taken. Which of them will have the least volume.

• A. HF
• B. HCl
• C. HBr
• D. HI

Answer 1

Answer: (B)

HCl

Answer 2

For $Z = \frac{pV_{m}}{RT} = 1 - \frac{ap}{RT}$ has the least volume because of greater molecular weight $Z = \frac{pV_{m}}{RT} = 1 + \frac{b}{RT}p$