Question

The osmotic pressure of a $5\%$ solution of cane sugar at ${150}^o$C is:

• A. $4$ atm
• B. $3.4$ atm
• C. $3.55$ atm
• D. $5$ atm

Answer 1

The correct option is B $3.4$ atm

Osmotic pressure $\left(\pi \right)=CRT$

where $C$ is the concentration of the solution

$\therefore \pi =\frac{5}{100}\times 0.0821\times (150+273)$

$=\frac{5}{100}\times 0.0821\times 423$

$\Rightarrow \pi =3.4atm$

Therefore, osmotic pressure is $3.4atm$ .