DP Chemistry (last assessment 2024)

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Question 20N.2.sl.TZ0.2c

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.2.sl.TZ0.2c
Level sl Paper 2 Time zone TZ0
Command term Draw Question number c Adapted from N/A
c.
[Maximum mark: 2]
20N.2.sl.TZ0.2c

Compound A is in equilibrium with compound B.

(c)

Compound A and B are isomers. Draw two other structural isomers with the formula C3H6O.

[2]

Markscheme

Accept any two C3H6O isomers except for propanone and propen-2-ol:

✔✔

 

Penalize missing hydrogens in displayed structural formulas once only.

Examiners report

Nearly half of the candidates gave two correct isomers. Propanal was often given as one of the isomers. Some candidates repeated the compounds given in the question and a few gave structures with 5 bonds on a carbon atom.

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