Question

Which of the following is used as an 'entrainer' in the separation of acetic acid-water mixture by distillation?

• A. Furfural
• B. Benzol
• C. Butyl acetate
• D. Hexane

Hint:

Furfural is commonly used as an entrainer in the separation of acetic acid from water in distillation processes due to its ability to form a separate phase with water.

Answer 1

The Correct Option is A

Step 1: Understanding the role of an entrainer.
An entrainer is a substance added to a distillation mixture to change the relative volatilities of the components, making the separation easier. In the case of separating acetic acid and water, furfural is commonly used as an entrainer because it forms a heterogeneous azeotrope with water, making the separation more efficient.

Step 2: Analysis of the options.
- (A) Furfural is indeed used as an entrainer in this separation process. - (B) Benzol and (C) Butyl acetate are not typically used as entrainers for acetic acid-water mixtures. - (D) Hexane is used in other applications but not as an entrainer for acetic acid-water separation.

Final Answer: \[ \boxed{\text{A) Furfural}} \]