Describe the colour change of potassium dichromate(VI) when it reacts with ethanol.

State with a reason whether chromium in potassium dichromate(VI) is oxidised or reduced by ethanol.

orange to green;

reduced because oxidation number of Cr decreases / Cr gains electrons;

Explanation needed for mark.

Candidates frequently confused oxidation and reduction or failed to provide a reason as to whether the chromium was oxidised or reduced by ethanol. This highlighted, again, the need for candidates to answer all parts of the question.