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Question 17N.3.SL.TZ0.b

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.SL.TZ0.b
Level SL Paper 3 Time zone TZ0
Command term State Question number b Adapted from N/A
b.
[Maximum mark: 1]
17N.3.SL.TZ0.b

Thin-layer chromatography was carried out on red and brown algae to discover what photosynthetic pigments they contained. The results were compared with the known pigments found in spinach leaves.

State a suitable solvent for extracting photosynthetic pigments from plant tissue.

[1]

Markscheme

acetone

OR

alcohol

OR

ether

Accept other named organic solvent

If there is more than one answer accept only the first one. (Note: “Water mixed with alcohol” would be correct as would “alcohol, water” but “water, alcohol” would be incorrect)

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