STANDARDChemistry-Solutions
STANDARD Chemistry Raoult's Law MCQ Question
Type: MCQ-numerical-Medium-Class 12
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?
A
80 torr
B
140 torr
C
72 torr
D
70 torr
Correct Answer
Option C
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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