STANDARD Chemistry Raoult's Law MCQ Question
3 moles of P and 2 moles of Q are mixed, what will be their total vapour pressure in the solution if their partial vapour pressures are 80 and 60 torr respectively?
80 torr
140 torr
72 torr
70 torr
Correct Answer
Detailed Explanation
The total vapour pressure is calculated using the mole fraction of each component. Mole fraction of P is 0.6 and Q is 0.4. The total pressure is 80 × 0.6 + 60 × 0.4 = 72 torr.
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