Chemistry · May / June 2025 · Paper 12 · Question 1

At temperature X, the volume of samples of hexane and pentane are not affected by changing the pressure from 1 atm to 2 atm. At temperature X, the pentane molecules are free to move. At temperature X, the hexane molecules are in fixed positions. What are the states of hexane and pentane at temperature X?

1. Ahexane: liquid, pentane: solid
2. Bhexane: liquid, pentane: gas
3. Chexane: solid, pentane: liquid
4. Dhexane: solid, pentane: gas

As printed in the paper