Chemistry · May / June 2023 · Paper 11 · Question 40

A laboratory has a powdered mixture of solid iodine and solid carbon. Iodine is very soluble in hexane and slightly soluble in water. Carbon is insoluble in both solvents. One sample of the mixture is shaken with hexane. This is X. Another sample of the mixture is shaken with water. This is Y. Which procedure is used to prepare a pure sample of iodine?

1. AX is distilled and the distillate is evaporated to dryness.
2. BX is filtered and the filtrate is allowed to evaporate to dryness.
3. CX is filtered and the residue is allowed to evaporate to dryness.
4. DY is distilled and the distillate is evaporated to dryness.

As printed in the paper