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The difference in boiling point of 2 liquid in fractional distillation is ____________

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The difference in boiling point of 2 liquid in fractional distillation is ____________

(a) Greater than 25 K

(b) Less than 25 K

(c) Equal to 25 K

(d) None of the mentioned

The question was asked in class test.

This intriguing question originated from Fractional Distillation in chapter Methods of Purification of Engineering Chemistry I

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Correct option is (b) Less than 25 K

Easiest explanation: Difference in the boiling point of 2 liquid in fractional distillation is is less than 25 K. Fractional distillation is the separation of a mixture into its component parts, or fractions, separating chemical compounds by their boiling point by heating them to a temperature at which one or more fractions of the compound will vaporize.

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