DP Chemistry (last assessment 2024)

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Question 22N.2.hl.TZ0.f

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Date November 2022 Marks available [Maximum mark: 2] Reference code 22N.2.hl.TZ0.f
Level hl Paper 2 Time zone TZ0
Command term Deduce, Sketch Question number f Adapted from N/A
f.
[Maximum mark: 2]
22N.2.hl.TZ0.f

Lignite, a type of coal, contains about 0.40 % sulfur by mass.

SF4Cl2 can form two isomers, one which is polar and another non-polar. Deduce the 3-dimensional representations of both isomers of SF4Cl2.

[2]

Markscheme

Non-polar isomer:

 ✔

 

Polar isomer:

 ✔

 

Accept other methods of clearly representing 3D structure.

Examiners report

Many students understood the significance of cis/trans orientation, but frequently the diagrams produced did not convey a sufficient 3D impression to merit both marks, resulting in an average score of about 60%.

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