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AQA A LEVEL BIOLOGY PAPER 2|7402/2 VERSION 1.0 FINAL QUESTION PAPERS & MERGED MARKING SCHEME | JUNE 2023

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A student used chromatography to separate the different photosynthetic pigments in a chlorophyll solution. She had the following materials. Chromatography paper A ruler and pencil Suitable glassware A solvent (solvent A) 2 cm3 of the chlorophyll solution Describe how she could use these materials to separate the photosynthetic pigments by chromatography. [4 marks] 0 1 . 2 Using solvent A, the student separated five pigments. She then repeated her method using a different solvent, B. Using solvent B, she separated six pigments. Explain the difference between these results. [2 marks]

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AQA A LEVEL BIOLOGY
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AQA A LEVEL BIOLOGY

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Uploaded on
February 25, 2024
Number of pages
54
Written in
2023/2024
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  • aqa a level biology paper 2
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