Neco 2025 Chemistry Question 48

Practice objective / multiple choice question 48 from the 2025 Neco Chemistry examination.

Neco 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 48 NECO • 2025 • CHEMISTRY • objective

Component A (boiling point 78 °C, vapor pressure at 80 °C = 0.30 atm) and component B (boiling point 100 °C, vapor pressure at 80 °C = 0.10 atm) form an ideal solution. The solution contains 0.500 mol of A and 0.300 mol of B. Calculate the total vapor pressure of the solution at 80 °C and state which component will be the first to boil.

Answer Options

A. Total vapor pressure = 0.225 atm; component B boils first
B. Total vapor pressure = 0.235 atm; component A boils first
C. Total vapor pressure = 0.215 atm; component B boils first
Correct Answer D. Total vapor pressure = 0.225 atm; component A boils first
Correct Answer
D
Correct Option:
Total vapor pressure = 0.225 atm; component A boils first

About This Question

This is Neco 2025 Chemistry Question 48. It is one of the objective questions from the 2025 Neco Chemistry examination.

Difficulty level: Medium .

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