Chemistry · Oct / Nov 2017 · Paper 11 · Question 20

A chemist investigated the rate of the reaction between ethene and hydrogen using a nickel catalyst. C2H4(g) + H2(g) → C2H6(g) The chemist carried out three experiments under different conditions. experiment number | pressure / atmospheres | particle size of catalyst 1 | 1 | powder 2 | 0.5 | powder 3 | 1 | large pieces Which row is correct?

1. A1 greater than 2 | 1 greater than 3
2. B1 greater than 2 | 3 greater than 1
3. C2 greater than 1 | 1 greater than 3
4. D2 greater than 1 | 3 greater than 1

As printed in the paper