DP Chemistry (last assessment 2024)

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Question 18N.3.hl.TZ0.d.i

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

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.

Identify the structural feature of the dye that allows the conversion of solar energy into electrical energy.

[1]

Markscheme

«extensive» conjugation

OR

«extensive» alternate single and double bonds ✔

 

Accept “delocalization”.

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