The osmotic pressure of equimolar solutions of urea, `BaCI_(2)` and `AICI_(3)` will be in the order
A. `AICI_(3) gt BaCI_(2) gt` Urea
B. `BaCI_(2) gt AICI_(3) gt` Urea
C. `"Urea" gt BaCI_(2) gt AICI_(3)`
D. `BaCI_(2) gt "Urea" gt AICI_(3)`

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Correct Answer - A
The particle conc. Of `AICI_(3)` solution will be maximum due to ionisation less in `BaCI_(2)` and minimum in urea.
`AICI_(3) rarr AI^(3+) +3CI^(-)`
`BaCI_(2) rarr Ba^(2+)+2CI^(-)`
More the number of particles in solution more is the osmotic pressure a coligative property.

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