List-I (Process of purification)                     List-2 (principle involved in the process)
A) crystallization boiling                             1) Liquids which are immiscible in water possessing high 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 vapor pressure below its melting point
D) Steam distillation                                        4) liquids which have B.pt difference less than $40^{\circ} C$
The correct match is

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A:2;B:3;C:1;D:4

A:3;B:2;C:4;D:1

A:2;B:3;C:4;D:1

A:4;B:2;C:1:D:3

answer is A.

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Detailed Solution

Liquids which are immiscible with water, volatile in steam and possessing a fairly high vapour pressure are purified by steam distillation.

Sublimation is applicable when the compound to be purified has high vapour pressure below its melting point and sublimates readily on heating and the impurities do not sublimate, the impure compound is taken in a beaker covered with a watch glass or plate and heated.

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