DP Chemistry (last assessment 2024)

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Question 22M.1.sl.TZ2.24

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.sl.TZ2.24
Level sl Paper 1 Time zone TZ2
Command term State Question number 24 Adapted from N/A
24.
[Maximum mark: 1]
22M.1.sl.TZ2.24

How many dichlorinated butane isomers can be formed by the halogenation of CH3CH2CH2CH3 with excess Cl2 in the presence of UV light?

A.  4

B.  6

C.  8

D.  10

[1]

Markscheme

B

Examiners report

Candidates had to work out the possible number of isomers of dichlorobutane and the majority only thought of 4 of the 6 possible isomers. 32% of the candidates obtained the correct answer.

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