| Date | November 2016 | Marks available | 1 | Reference code | 16N.3.sl.TZ0.7 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Explain | Question number | 7 | Adapted from | N/A |
Question
Liquid crystals have many applications.
Outline how a lyotropic liquid crystal differs from a thermotropic liquid crystal.
[2]
a.
Explain the effect of increasing the temperature of a nematic liquid crystal on its directional order.
[1]
b.
Markscheme
Do not award any credit if one type only is described as the question asks how they differ.
a.
decreases AND as energy «added» overcomes interparticle forces
OR
decreases AND as energy «added» causes faster movement «of particles»
b.
Examiners report
[N/A]
a.
[N/A]
b.
