DP Chemistry (last assessment 2024)

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Question 19M.2.hl.TZ1.1d(ii)

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.hl.TZ1.1d(ii)
Level hl Paper 2 Time zone TZ1
Command term Draw Question number d(ii) Adapted from N/A
d(ii).
[Maximum mark: 2]
19M.2.hl.TZ1.1d(ii)

Xylene is a derivative of benzene. One isomer is 1,4-dimethylbenzene.

Bromine reacts with alkanes.

(d(ii))

1,4-dimethylbenzene reacts as a substituted alkane. Draw the structures of the two products of the overall reaction when one molecule of bromine reacts with one molecule of 1,4-dimethylbenzene.

[2]

Markscheme

[✔]

HBr [✔]

 

Note: Accept condensed formulae, such as CH3C6H4CH2Br.

Examiners report

Some candidates lost one mark for the bond originated from H in CH3 instead of C. Some teachers thought the use of the word “substituted alkane” made the question more difficult than it should have been.

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