DP Chemistry (first assessment 2025)

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Question 20N.1B.SL.TZ0.a

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1B.SL.TZ0.a
Level SL Paper 1B Time zone TZ0
Command term Suggest Question number a Adapted from N/A
a.
[Maximum mark: 1]
20N.1B.SL.TZ0.a

Suggest why a non-polar solvent was needed.

[1]

Markscheme

oil is non-polar «and dissolves best in non-polar solvents»
OR
oil does not dissolve in polar solvents ✔

Do not accept “like dissolves like” only.

Examiners report

A well answered question where replies used all the alternatives provided. Very few candidates limited their answer to "like dissolves like" and while this expression was used most student elaborated with higher quality answer. Some common incorrect responses included students talking about dissolving the crisps (chips) or indicating the oil was a polar compound.

Syllabus sections