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Q.

Insulin is dissolved in suitable solvent and the osmotic pressure in atm of solutions at various concentration is measured at 20°C. The slope of the plot of p against C is found to be 4.65 × 10-3. The molecular weight of insulin is 5.17 × 10x. Then ‘x’ is

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a

One

b

five

c

two

d

six

answer is D.

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Detailed Solution

Applying Osmotic pressureπ V=WBMB×RTπ=WBV×RTMB⇒π=C×RTMB×100 . . . . (1) While C= conc.in g/cc,4=x×m . . . . (2)Combination equation 1 & 2Slope=RTMB×1000∴MB=RTSlope×1000=0.0821×293×10004.65×10−3=5.17×106
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Insulin is dissolved in suitable solvent and the osmotic pressure in atm of solutions at various concentration is measured at 20°C. The slope of the plot of p against C is found to be 4.65 × 10-3. The molecular weight of insulin is 5.17 × 10x. Then ‘x’ is