# 9) Insulin is dissolved in a suitable solvent and the osmotic pressure $\left(\mathrm{\pi }\right)$ of solutions of various concentrations (g/cm3) C is measured at 200C. The slope of a plot of $\mathrm{\pi }$ against C is found to be 4.65 x 10-3. The molecular weight of the insulin is (A) 3 x 105         (B) 9 x 105          (C) 4.5 x 105           (D) 5.16 x 105

Dear student

We need to use the concepts of colligative property to get the answer. As per given in the question, insulin is dissolved in a particular solvent. Since the graph was plotted and the slope was found to be 4.65x10-3
Using the equation for the osmotic pressure, one can write,

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