Question

Statement-1: During fractional distillation, higher boiling point will condense first.
Statement-2: In fractionating column, one which has higher boiling point value will be more in concentration above the fractionating column.

• A. Both Statement I and Statement II are correct.
• B. Statement I is correct but Statement II is incorrect.
• C. Statement I is incorrect but Statement II is correct.
• D. Both Statement I and Statement II are incorrect.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question examines the principles of fractional distillation and the composition of vapors at different heights in the column.
Step 2: Detailed Explanation:
Statement-1: During fractional distillation, as the vapors of a mixture rise up the column, they encounter cooler regions. The component with the higher boiling point reaches its condensation temperature first and condenses back to liquid. Thus, the higher boiling point component condenses first at a lower height. Statement 1 is correct.

Statement-2: The more volatile component (the one with the lower boiling point) stays in the vapor phase longer and travels higher up the column. Therefore, the lower boiling point component will be in higher concentration at the top (above) the fractionating column. Statement 2 is incorrect.
Step 3: Final Answer:
Statement I is correct but Statement II is incorrect.