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A polymer sample is made of 30% molecule...

A polymer sample is made of 30% molecules of molecular mass 20,000, 40% of molecular mass 30,000 and rest of mass 60,000 . The `barM_n` is :

A

`36,0000`

B

`36,000`

C

`46,000`

D

`50,000`

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The correct Answer is:
B
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MODERN PUBLICATION-POLYMERS -Multiple Choice Questions - LEVEL -II
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