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Twenty grams of a substance were dissolv...

Twenty grams of a substance were dissolved in 500ml. Of water and the osmotic pressure of the solution was found to be 600mm of mercury at `15^(@)"C".` Determine the molecular weight of the substance.

A

1000

B

1200

C

1400

D

1800

Text Solution

Verified by Experts

The correct Answer is:
B
`pi=(n)/(V)RT=(m//MRT/)/(V)`
`(600)/(760)=(20xx0.0821xx288xx1000)/(500xxM),M=1200`.
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