Chemistry · May / June 2020 · Paper 12 · Question 6

Hydrogen sulfide, H2S, and hydrogen chloride, HCl, are both gases at temperatures above –50 °C. Which gas will diffuse most rapidly at the temperature given?

1. Ahydrogen chloride at –40 °C
2. Bhydrogen chloride at –20 °C
3. Chydrogen sulfide at –40 °C
4. Dhydrogen sulfide at –20 °C

As printed in the paper