GKFix MCQ Question

Which of the following best describes the principle of distillation under reduced pressure?

• A. A liquid boils when the external pressure is reduced to match its vapour pressure at a lower temperature.
• B. The liquid is heated beyond its boiling point to increase vapour formation.
• C. Water is added to lower the boiling point of the liquid.
• D. The air pressure is increased to raise the vapour pressure of the liquid.