Which has maximum osmotic pressure at temperature`TK`?

Options

A. 150ml of 1.0M urea solution
B. 210ml of 1.0M urea solution
C. Mixture of 150ml of 1.0M urea solution and 210 mL of 1.0M glucose solution
D. Allof the above are isotonic solutions

Answer

D

Explanation

`pi=MRT`
(a)`pi("urea")=Rt`
`(b)pi("glucose")=RT`
( C)`M("mixture")=(M_(1)V_(1)+M_(2)V_(2))/(V_(1)+V_(2))=(150xx1+210xx1)/(150+210)=1M`
`:.pi("mixture")=RT`
Thus, equal osmotic pressure. Thus, isotonic.