Question

Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
(a) What could X be?
(b) What could Y be?
(c) Name the process Z.
(d) Which process would you use to recover both the components X and Y from tincture of iodine?
(e) Which process can be used to recover only component Y from tincture of iodine?

Answer 1

Tincture of iodine is prepared by dissloving proper amount of iodine(solid) in an alcohol solution.

(a) So X would be alcohol.

(b) So Y would be iodine.

(c) When the solid phase directly converts to gas phase on heating, it is known as sublimation. So process Z is sublimation.

(d) By fractional distillation method, we can easily separate both the components. As there is a difference in the boiling point of two solutions.

(e) By evaporation method, we can easily separate the component Y(Iodine) from the given sample.