Fractional distillation is used to separate liquids which differ in their boiling points by?

0 - 10^{o}

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10 - 20^{o}

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20 - 40^{o}

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40 - 80^{o}

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Solution

The correct options are
A $0 - 10^{o}$ C
B $10 - 20^{o}$ C
Fractional Distillation is a technique used to separate miscible liquids for which the boiling point difference between the two liquids is less than 25K or 25 $^{o} C$ (ref.- NCERT Cl-9).
Option C and D may have the boiling point difference of more than 25 $^{o} C$ .
Hence, Option A and B both can be the correct range.

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Similar questions

(A) Simple distillation	(i) To separate the liquids which are steam volatile, insoluble in water and contains non-volatile impurities.
(B) Fractional distillation	(ii) To separate liquids which decompose at a temperature below their normal boiling points
(C) Vacuum distillation	(iii) To separate two or more liquids which have boiling points close to each other.
(D) Steam distillation	(iv) To separate liquid from non-volatile impurities.

Boiling point of liquid A is 25^oC and that of liquid B is 40^oC. Which technique will you use to separate these miscible liquids?

353 K

338 K

25 K

25^{0} C

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