Chemistry - PRACTICAL ORGANIC CHEMISTRY Question with Solution | TestHub
List - I | List - II |
|---|---|
(A) Crystallization | (1) Liquids which are immiscible in water possessing high boiling point, steam volatile. |
(B) Sublimation | (2) The compound should be soluble in the solvent at its boiling temperature |
(C) Fractional distillation | (3) The compound should have high vapour pressure below its melting point |
(D) Steam distillation | (4) Liquids which have boiling point difference less than |
The correct match is :
Options:
Answer:
Solution:
(A) Crystallization based on the difference in the solubilities of the compound and the impurities in a suitable solvent. The impure compound is dissolved in a solvent in which it is sparingly soluble at room temperature but appreciably soluble at higher temperature.
(B) Sblimation is used to separate sublimable compounds from non-sublimable impurities and sublimable compounds have high vapour pressure below their M.P.
(C) If the difference in boiling points of two liquids is not must, simple distillation cannot be used to separate them, in such cases fractional distillation is used.
(D) Steam distillation is applied to separate substance which are steam volatile and are immiscible with water.
