Which one of the following solutions of compounds show highest osmotic pressure? (AB, `AB_2 and A_2B_3` are ionic compounds)

Options

A. 3.0 M Ab type I = 1.6 and temperature is `27^@C`
B. 2.5 M `AB_2` type I = 2.5 and temperature is `57^@C`
C. 1.5 M `A_2B_3` type I = 4.1 and temperature is `27^@C`
D. 5.0 M urea I = 1.0 and temperature is `67^@C`

Answer

B

Explanation

answer(2) Osmotic pressure, `pi = iMRT`
By verification method, option (2) is correct. .
`pi` = (2.5)(2.5)(0.08206)(57 + 273).
`therefore pi = 169.2`.