MDCAT Chemistry MCQ #4279

MDCAT Chemistry MCQ #4279

1. Question 1

   Q1. The vapor pressure of a liquid is the pressure exerted by the vapor

   • A) when the rate of evaporation equals the rate of condensation
   • B) when the liquid is at its boiling point
   • C) at absolute zero
   • D) in a vacuum

   Answer: when the rate of evaporation equals the rate of condensation

   Explanation: Vapor pressure is the pressure exerted when evaporation and condensation rates are equal; equilibrium condition.