DP Chemistry (last assessment 2024)

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Question 18N.3.hl.TZ0.15d.iii

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.3.hl.TZ0.15d.iii
Level hl Paper 3 Time zone TZ0
Command term State Question number d.iii Adapted from N/A
d.iii.
[Maximum mark: 1]
18N.3.hl.TZ0.15d.iii

Chemical energy from redox reactions can be used as a source of electrical energy.

The chemical structure of a photosensitive dye found in blueberries and a schematic diagram of a solar cell are shown.

(d.iii)

State the purpose of TiO2.

[1]

Markscheme

transfers e– to external circuit ✔

 

Accept “provides large surface area”.

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