A-level Chemistry Mark scheme Paper 1 June 2018

MARK SCHEME – A-LEVEL CHEMISTRY – 7405/1 – JUNE 2018 5 3.5 Oxidation states In general, the sign for an oxidation state will be assumed to be positive unless specifically shown to be negative. 3.6 Interpretation of ‘it’ Answers using the word ‘it’ should be given credit only if it is clear that the ‘it’ refers to the ................
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