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Question

Insulin is dissolved in a suitable solvent and the osmotic pressure π of solution of various concentrations(g/cm3) C is measured at 20o . The slope of a plot of π against c is found to be 4.65×103. The molecular weight of the insulin(g/mol) is :

A
3×105
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B
9×105
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C
4.5×105
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D
5.16×106
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Solution

The correct option is D 5.16×106
π=WM×RTVorπC=RTM
slope=RTM
or M=0.082×2934.65×103×103

5.16×106g

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