Chemistry · May / June 2023 · Paper 12 · Question 17

Hydrogen is made industrially by the reaction shown. CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g) ΔH = –41 kJ / mol Statements about this industrial process are given. 1 A high pressure can be used to increase the rate of formation of hydrogen. 2 A high pressure can be used to shift the equilibrium to the right. 3 A high temperature can be used to increase the rate of formation of hydrogen. 4 A high temperature can be used to shift the equilibrium to the right. Which statements are correct?

1. A1, 2 and 3
2. B1 and 3 only
3. C1 only
4. D2 and 4

As printed in the paper