Question

Simple distillation can be used to separate liquid which differs in their boiling points at least by:

• A. $5^{0}C$
• B. ${10}^{0}C$
• C. ${25}^{0}C$
• D. ${100}^{0}C$

Answer 1

Answer: (C)

${25}^{0}C$

In order for simple distillation to work, the two liquids' boiling points must have a difference of at least 25 degrees Celsius.

Simple distillation is used when the difference in boiling points is more than ${25}^{0}C$.

Fractional distillation is used when the boiling point difference is less than ${25}^{0}C$.

So the Correct answer is (C).