Q95 / 200 · NEET 2024 · Chemistry
The plot of osmotic pressure $(\Pi)$ vs concentration ( $\mathrm{mol} \mathrm{L}^{-1}$ ) for a solution gives a straight line with slope 25.73 $\mathrm{L}^{\text {bar mol-1}}$. The temperature at which the osmotic pressure measurement is done is
- A$310^{\circ} \mathrm{C}$
- B$25.73^{\circ} \mathrm{C}$
- C$12.05^{\circ} \mathrm{C}$
- Correct answerD$37^{\circ} \mathrm{C}$
Solution
$\Pi=\text { CRT }$
Slope $=$ RT
$\begin{aligned}
& 25.73=0.083 \times \mathrm{T} \\
& \mathrm{T}=\frac{25.73}{0.083}=309.47 \approx 310 \mathrm{~K}
\end{aligned}$
$\therefore$ Temperature in ${ }^{\circ} \mathrm{C}=310-273$
$=37^{\circ} \mathrm{C}$
Hence, the correct answer is option: 'D'.