DP Chemistry (first assessment 2025)

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Question 19M.1A.HL.TZ2.22

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.HL.TZ2.22
Level HL Paper 1A Time zone TZ2
Command term Question number 22 Adapted from N/A
22.
[Maximum mark: 1]
19M.1A.HL.TZ2.22

Consider the following equilibrium reaction.

2N2O (g) + O2 (g) ⇌ 4NO (g)        ΔH = +16 kJ

Which change will move the equilibrium to the right?

A. Decrease in pressure

B. Decrease in temperature

C. Increase in [NO]

D. Decrease in [O2]

[1]

Markscheme

A

Examiners report

77 % of the candidates applied Le Chatelier’s Principle correctly. The question had a high discrimination index.

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