Question

The osmotic pressure of decimolar solution of urea at ${27}^{o}C$ is:

• A. 2.49 bar
• B. 5.0 bar
• C. 3.4 bar
• D. 1.25 bar

Answer 1

The correct option is A 2.49 bar

Given,

$c=0.1M$

$T=300K$

$V=1L$

$R=0.0821Latmmo{l}^{-1}K-1$

Using the relation, $\pi =\frac{c}{V}RT$

$\pi =\frac{0.1}{1}\times 0.0821\times 300$

$\Rightarrow \pi =2.463atm=2.463\times 1.01325=2.49bar$

Hence A is the correct answer