Solutions Question 117
Question: Benzene and toluene form nearly ideal solutions. At 20°C, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The parial vapour pressure of benzene at 20°C for a solution containing 78g of benzene and 46g of toluene in torr is [AIEEE 2005]
Options:
A) 50
B) 25
C) 37.5
D) 53.5
Show Answer
Answer:
Correct Answer: A
Solution:
PB = $ P_B^{o}X_{B} $ ; \ $ P_{B}=\frac{\frac{78}{78}}{\frac{78}{78}+\frac{46}{92}}\times 75 $ ; \ PB = 50 torr
