Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-numerical-Easy-Class 12
Calculate the total vapour pressure of an ideal solution at a certain temperature if the mole fraction of component 1 is 0.4, its vapour pressure in pure form is 50 mmHg, and the vapour pressure of component 2 in pure form is 100 mmHg.
A
70 mmHg
B
80 mmHg
C
90 mmHg
D
100 mmHg
Correct Answer
Option A
Detailed Explanation
Using the formula for total vapour pressure: p_total = x1 * p1^0 + x2 * p2^0, where x1 = 0.4 and x2 = 1 - x1 = 0.6, we get p_total = 0.4 * 50 + 0.6 * 100 = 70 mmHg.
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