Edexcel Gcse Chemistry/additional Science - Unit C2: Discovering Chemistry Page 16
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3016
(i)
State how you can tell that dyes W, X and Y
are pure. (1 mark)
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(ii) Explain what you can deduce about the ink Z
used on the note. (2 marks)
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(Total for Question 3 = 10 marks)
(Questions continue on next page)
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