The relationship between osmotic pressure at $273 \mathrm{~K}$ when $10 \mathrm{~g}$ glucose…

The relationship between osmotic pressure at $273 \mathrm{~K}$ when $10 \mathrm{~g}$ glucose $\left(\mathrm{P}_{1}ight), 10 \mathrm{~g}$ urea $\left(\mathrm{P}_{2}ight)$, and
$10 \mathrm{~g}$ sucrose $\left(\mathrm{P}_{3}ight)$ are dissolved in $250 \mathrm{~mL}$ of water is
  1. $\quad \mathrm{P}_{1}>\mathrm{P}_{2}>\mathrm{P}_{3}$
  2. $\mathrm{P}_{3}>\mathrm{P}_{1}>\mathrm{P}_{2}$
  3. $\mathrm{P}_{2}>\mathrm{P}_{1}>\mathrm{P}_{3}$
  4. $\mathrm{P}_{2}>\mathrm{P}_{3}>\mathrm{P}_{1}$

Solution

Moles of glucose $\frac{10}{180}=0.05$,
urea $=\frac{10}{60}=0.16$, Sucrose $=\frac{10}{342}=0.029$
Hence osmotic presure $\mathrm{P}_{2}>\mathrm{P}_{1}>\mathrm{P}_{3}(\pi \propto \mathrm{C})$

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more SOLUTIONS questions on Aicharya