A) 140 torr
B) 20 torr
C) 68 torr
D) 72 torr
Correct Answer: D
Solution :
[d] Mole fraction of \[P=\frac{3}{3+2}=\frac{3}{5}\] |
Mole fraction of \[Q=\frac{2}{3+2}=\frac{2}{5}\] |
Hence, total vapour pressure |
= Mole fraction of P × V. P of P + mole fraction of Q × V.P. of Q |
\[=\left( \frac{3}{5}\times 80+\frac{2}{5}\times 60 \right)=48+24\] |
\[=72\,Torr\] |
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