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Question 17N.2.SL.TZ0.05c

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.2.SL.TZ0.05c
Level SL Paper 2 Time zone TZ0
Command term Compare and contrast Question number c Adapted from N/A
c.
[Maximum mark: 2]
17N.2.SL.TZ0.05c
(c)

Compare and contrast cis-fatty acids and trans-fatty acids.

[2]

Markscheme

a. both are unsaturated fatty acids

    OR

    both have two carbon atoms joined by a double bond

b. in cis-fatty acids the two H atoms are on the same side while in trans-fatty acids they are on opposite sides

    OR

    cis-fatty acids are healthier than trans-fatty acids

    OR

    cis-fatty acids have a lower boiling/melting point than trans

    OR

    cis-fatty acids have a kink «in the chain» but trans do not

Accept answer in an annotated diagram

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