DP Chemistry (first assessment 2025)

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Question 21M.1A.SL.TZ2.21

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.SL.TZ2.21
Level SL Paper 1A Time zone TZ2
Command term Identify Question number 21 Adapted from N/A
21.
[Maximum mark: 1]
21M.1A.SL.TZ2.21

Which statements are correct about the action of a catalyst in a chemical reaction?

I.   It increases the energy of each collision.
II.  It alters the mechanism of the reaction.
III. It remains unchanged at the end of the reaction.

A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

[1]

Markscheme

C

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