Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Chemistry  >>  Solutions
0 votes

At room temperature $25^{\large\circ}C$,the vapour pressure of pure methyl alcohol is 90 torr.Mol fraction of $CH_3OH$ in a solution in which vapour pressure of $CH_3OH$ is 20 torr at $25^{\large\circ}$ is ?

$\begin{array}{1 1}(a)\;0.30\\(b)\;0.22\\(c)\;0.40\\(d)\;0.50\end{array}$

Can you answer this question?

1 Answer

0 votes
$\large\frac{P^0-P}{P^0}=$$X$=mole fraction of solute
$\therefore$ Mole fraction of solvent =1-0.78
$\Rightarrow 0.22$
Hence (b) is the correct answer.
answered Feb 14, 2014 by sreemathi.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App