Question

Two liquids A and B boil at $145{}^{\circ }C$ and $190{}^{\circ }C$ respectively. At $80{}^{\circ }C$ which of them has higher vapour pressure?

• A. Liquid A
• B. Liquid B
• C. Both have equal vapour pressure
• D. None of the above

Answer 1

Answer: (A)

Lower the boiling point, more volatile it is. Therefore, liquid A will have higher vapour pressure at $80{}^{\circ }C.$