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If K(f) value of H(2) O is 1.86. The val...

If `K_(f)` value of `H_(2) O` is 1.86. The value of `Delta T_(f)` for 0.1 m solution of non-volatile solute is

A

`7.8 mol L^(-1)`

B

`1.5 mol L^(-1)`

C

`0.075 mol L^(-1)`

D

`0.15 mol L^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
NaCl sol. used should be isotonic with blood stream.
For NaCl, I = 2 , ` pi = icRT`
or `c = (pi)/(I RT) = (7.8bar)/(2 xx 0.083 bar LK^(-1) mol^(-1) xx 310 K)`
`= 0.15 mol L^(-1)`
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