Which is a more volatile liquid?

C_{2} H_{5} O H

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C H_{3} C O O H

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C_{2} H_{5} O C_{2} H_{5}

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C_{6} H_{6}

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Solution

The correct option is B $C_{6} H_{6}$
Presence of hydrogen bonding in a liquid decreases its volatile nature. This is because due to hydrogen bonding, there is more association between the molecules and the tendency to go into gaseous phase decreases. Hence, $C_{6} H_{6}$ will be more volatile liquid since it has no hydrogen bonding.

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Question 35
Colligative properties are observed when .......... .
(a) a non-volatile solid is dissolved in a volatile liquid
(b) a non-volatile liquid is dissolved in another volatile liquid
(c) a gas is dissolved in non-volatile liquid
(d) a volatile liquid is dissolved in another volatile liquid

Q. Match the following.

(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.

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