Question

28 g of each of the following gases are taken at `27^(@)C` and 600 mm pressures. Which of these will have the least volume?
A. HBr
B. HCl
C. HF
D. HI

Answer 1

Correct Answer - D
PV=nRT or `V=(nRT)/(P)`. As P and T are same for all given gases, `V prop n`. As `n=(w)/(M)`, n will be least for which M is maximum viz. HI.