Q79 / 180 · AIIMS 2015 · Chemistry

The relationship between osmotic pressure at $273 \mathrm{~K}$ when $10 \mathrm{~g}$ glucose $\left(P_1\right), 10 \mathrm{~g}$ urea $\left(P_2\right)$ and $10 \mathrm{~g}$ sucrose $\left(P_3\right)$ are dissolved in $250 \mathrm{~mL}$ of water is

  • A
    $P_1>P_2>P_3$
  • B
    $P_3>P_1>P_2$
  • Correct answer
    C
    $P_2>P_1>P_3$
  • D
    $P_2>P_3>P_1$

Solution

$P=\frac{w}{M V} R T$; since $w, V$ and $T$ are same, thus $P \propto(1 / M)$.

Hence, the correct answer is option: 'C'.

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