0654.C6.2.02 — State that a catalyst increases the rate of a 6 State that a catalyst decreases the activation reaction and is unchanged at the end of a ene: past paper questions
Real questions on 0654.c6.2.02 — state that a catalyst increases the rate of a 6 state that a catalyst decreases the activation reaction and is unchanged at the end of a ene
The newest 8 of 8 written questions. Open one to see it on the real paper.
- 0973/32 · May/June 2024 · Q5c(ii)[1]
Describe the effect of a catalyst on chemical reactions.
See it on the paper → - 0973/42 · May/June 2024 · Q11a[2]
A catalyst is used in the Contact process. Complete Fig. 11.1 to show the two other essential conditions used.
See it on the paper → - 0973/32 · May/June 2023 · Q11b(v)[2]
Suggest why the calcium carbonate is broken into small pieces before being thermally decomposed.
See it on the paper → - 0973/41 · October/November 2022 · Q8c[2]
Sulfur dioxide is used in the manufacture of sulfuric acid in the Contact process. 2SO 2 (g) + O 2 (g) 2SO 3 (g) Describe two conditions used for this reversible reaction.
See it on the paper → - 0973/41 · May/June 2022 · Q11a[1]
The volume of acid does not affect the rate of reaction. State which two experiments show this. and
See it on the paper → - 0973/41 · May/June 2022 · Q11b[4]
Increasing the temperature of the acid affects the rate of reaction. Increasing the concentration of the acid also affects the rate of reaction. For each factor (temperature and concentration): • • describe how the rate of reaction changes explain why the rate of reaction changes, using ideas about particles. temperatu...
See it on the paper → - 0973/32 · May/June 2020 · Q11b(ii)[1]
Suggest why a catalyst is needed in the reaction vessel.
See it on the paper → - 0973/42 · May/June 2020 · Q11c(iii)[1]
State why iron is needed in the Haber process.
See it on the paper →
What examiners said
Almost all candidates were able to state that experiments 2 and 3 show that volume of acid does not affect the rate of reaction.
— Examiner report, May/June 2022, 0973/41 Q11(a) (Cambridge)
This question required candidates to state how increasing temperature and concentration affect the rate of a reaction, and then give an explanation for each factor. The majority of candidates gained marks for stating that in both cases, the rate of reaction increases. Some candidates explained that increasing temperature increases the (kinetic) energy of the particles, while others simply stated t...
— Examiner report, May/June 2022, 0973/41 Q11(b) (Cambridge)
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