DP Chemistry (last assessment 2024)

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Question 22M.1.sl.TZ2.16

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.sl.TZ2.16
Level sl Paper 1 Time zone TZ2
Command term State Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
22M.1.sl.TZ2.16

Why does a reaction for a sample of gases, at constant temperature, occur faster at higher pressure?

A.  Collisions are more frequent.

B.  Collisions are more energetic.

C.  High pressure lowers activation energy.

D.  The reaction is more exothermic at high pressure.

[1]

Markscheme

A

Examiners report

A very well-answered question in which 90% of the candidates related the effect of higher pressure on the rate of reaction of gaseous reactants to the collision theory correctly.

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