Chemistry · Oct / Nov 2025 · Paper 12 · Question 1

Separate samples of water and air each have a volume of 30 cm³ at room temperature and pressure. The pressure applied to both samples is increased by the same amount at room temperature. Which row describes the volumes at the increased pressure?

1. Avolume of water 20 cm³, volume of air 3 cm³
2. Bvolume of water 20 cm³, volume of air 300 cm³
3. Cvolume of water 30 cm³, volume of air 3 cm³
4. Dvolume of water 30 cm³, volume of air 300 cm³

As printed in the paper