Which has the maximum osmotic pressure at temperature `T`?

Options

A. `100 mL` of `1 M` urea solution.
B. `300 mL` of `1 M` glucose solution.
C. Mixture of `100 mL` of `1 M` urea solution and `300 mL` of `1 M` glucose solution.
D. All are isotonic.

Answer

D

Explanation

`pi=MRT`
`pi=RT`
`pi=RT`
`pi=RT`(mix has concentration = `1 M`)