DP Chemistry (first assessment 2025)

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Question 19M.1A.SL.TZ2.33

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.SL.TZ2.33
Level SL Paper 1A Time zone TZ2
Command term Question number 33 Adapted from N/A
33.
[Maximum mark: 1]
19M.1A.SL.TZ2.33

Methane reacts with chlorine in sunlight.

CH4 (g) + Cl2 (g) → CH3Cl (g) + HCl (g)

Which type of reaction occurs?

A. free-radical substitution

B. electrophilic substitution

C. nucleophilic substitution

D. electrophilic addition

[1]

Markscheme

A

Examiners report

85 % of the candidates chose free-radical substitution as the type of reaction occurring between methane and chlorine in sunlight.

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