Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The empirical formula of A is CH2O. The molecular mass of A is _____ g. (Nearest integer)
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Solution
Sol. For Isotonic solutions $\pi_1=\pi_2$
$$
\begin{aligned}
& \Rightarrow C_1=C_2 \\
& \frac{12}{x}=0.05[x \rightarrow \text { Molar Mass of } A] \\
& X=240
\end{aligned}
$$
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