Question

You are given a mixture of iodine in alcohol called tincture of iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture, if the difference between the boiling points of iodine and alcohol is more than $25{}^{\circ }C$?

• A. Evaporation
• B. Distillation
• C. Fractional distillation
• D. Centrifugation

Answer 1

The correct option is B

Distillation

To recover both the components (iodine and alcohol) from the tincture of iodine, the distillation process is used because the difference between the boiling points of both components is more than $25{}^{\circ }C$. Moreover, if we want only one component i.e. iodine then evaporation can be used as alcohol has the lower boiling point as compare to iodine so it converts to vapour state and only iodine is left but in distillation vapours of alcohol are condensed to recover it.