DP Chemistry (last assessment 2024)

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Question 18M.3.hl.TZ1.c

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.hl.TZ1.c
Level hl Paper 3 Time zone TZ1
Command term Justify, Predict Question number c Adapted from N/A
c.
[Maximum mark: 1]
18M.3.hl.TZ1.c

Photovoltaic cells are much less hazardous than nuclear fission.

The structure of two dyes used in DSSCs are shown.

M18/4/CHEMI/HP3/ENG/TZ1/15.c

Predict, giving a reason, which dye will absorb light of longer wavelength.

[1]

Markscheme

B AND has greater/more «extensive» conjugation

 

Accept “more alternating single and double bonds”.

[1 mark]

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