DP Chemistry (last assessment 2024)

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Question 17N.3.sl.TZ0.8a.ii

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.sl.TZ0.8a.ii
Level sl Paper 3 Time zone TZ0
Command term Suggest Question number a.ii Adapted from N/A
a.ii.
[Maximum mark: 1]
17N.3.sl.TZ0.8a.ii

Consider the following lipid and carbohydrate.

(a.ii)

The empirical formula of fructose is CH2O. Suggest why linoleic acid releases more energy per gram than fructose.

[1]

Markscheme

ratio of oxygen to carbon in linoleic acid lower

OR

linoleic acid less oxidized

OR

linoleic acid more reduced

Accept “«average» oxidation state of carbon in linoleic acid is lower”.

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