The $pH$ of a $0.2 \ M$ aqueous solution of a dibasic acid $(H_2A)$ is $1.699$. Its osmotic pressure at $T \ K$ is ......... $RT$.

The osmotic pressure of a solution at $327\,^oC$ and concentration $C$ is $P$. If the osmotic pressure of the same solution at concentration $C/2$ and temperature $427\,^oC$ is $2\, atm$,then the value of $P$ is:

At $300 \ K$,$6 \ g$ of urea was dissolved in $500 \ mL$ of water. What is the osmotic pressure (in $atm$) of the resultant solution? $(R=0.082 \ L \ atm \ K^{-1} \ mol^{-1})$ $(C=12; N=14; O=16; H=1)$

Provide examples of osmotic pressure in daily life.

Explain isotonic solutions.

Give an example of a material used for making a semipermeable membrane for carrying out reverse osmosis.