Q.

The solution containing 4.0 gm of a polyvinyl chloride polymer in 1 litre of dioxane was found to have an osmotic pressure 6.0×10−4 atmosphere at 300 K, the value of R used is 0.082 litre atmosphere mole−1K−1. The molecular mass of the polymer was found to be

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a

3.0×102

b

1.6×105

c

5.6×104

d

6.4×102

answer is B.

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Detailed Solution

πV=wmRT∴ 6×10−4×1=4m×0.0821×300⇒m=1.64×105

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