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0.6gof a solute is dissolved in 0.1litre...

`0.6g`of a solute is dissolved in `0.1`litre of a solvent which develops an osmotic pressure of 1.23 at m at `27^(@)C`.The molecular mass of the substance is

A

`149.5 g mol^(-1)`

B

`120.0 g mol^(-1)`

C

`430.0 g mol^(-1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`pi=CRT`
`rArr 1.23=(0.6//Mw_(B))/(0.1) xx 0.0821 xx 300`
`rArr Mw_(B) = 120.15 g "mol"^(-1)`
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