DP Chemistry (last assessment 2024)

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Question 22M.2.sl.TZ2.d(ii)

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.2.sl.TZ2.d(ii)
Level sl Paper 2 Time zone TZ2
Command term Deduce Question number d(ii) Adapted from N/A
d(ii).
[Maximum mark: 1]
22M.2.sl.TZ2.d(ii)

Carbon forms many compounds.

But-2-ene reacts with hydrogen bromide.

Write the equation for the reaction between but-2-ene and hydrogen bromide.

[1]

Markscheme

CH3CH=CHCH3 (g) + HBr (g) → CH3CH2CHBrCH3 (l)

OR

C4H8 (g) + HBr (g) → C4H9Br (l) ✔

Examiners report

Half of the candidates wrote the correct equation for the reaction of but-2-ene with hydrogen bromide. Incorrect answers included hydrogen as a product. As expected, the question correlated well with highly achieving candidates.

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