DP Chemistry (last assessment 2024)

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Question 19N.3.sl.TZ0.a

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.sl.TZ0.a
Level sl Paper 3 Time zone TZ0
Command term Describe Question number a Adapted from N/A
a.
[Maximum mark: 2]
19N.3.sl.TZ0.a

A soap solution can form a liquid-crystal state.

Describe the arrangement of soap molecules in the nematic liquid crystal phase.

[2]

Markscheme

molecules point/align in same direction/orientation
OR
molecules have directional order ✔

molecules randomly distributed
OR
molecules not in a layered arrangement
OR
molecules do not have positional order ✔

NOTE: Accept suitable diagram for M1 and M2.

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