Solutions Question 124
Question: The vapour pressure of two liquids P and Q are 80 and 600 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be [CBSE PMT 2005]
Options:
A) 140 torr
B) 20 torr
C) 68 torr
D) 72 torr
Show Answer
Answer:
Correct Answer: D
Solution:
$ P_{T}=P_P^{0}X_{P}+P_Q^{0}X_{Q} $ ; $ P_{T}=80\times \frac{3}{5}+60\times \frac{2}{5} $
$ P_{T}=48+24=72\ torr $ .
