Chemistry · May / June 2020 · Paper 11 · Question 5

Which statement about methods of purification and analysis is correct?

1. AA liquid that boils over a range of temperatures may still be 100% pure.
2. BAn insoluble substance may be separated from water by crystallisation.
3. CChromatography may only be used to separate coloured substances.
4. DLiquid air can be fractionally distilled, giving oxygen as one of the products.

As printed in the paper