The osmotic pressure of the equimolar solutions of the following at the same temperature will increase in order

(A) $NACl$
(B) $K_2SO_4$
(C) $K_3[Fe(CN)_6]$
(D) $NH_2CONH_2$

Choose the correct answer from the options given below.

(D), (A), (B), (C)

The correct answer is Option (4) → (D), (A), (B), (C)

Since all solutions are equimolar (same molar concentration C), the osmotic pressure depends only on the van’t Hoff factor (i):

Increasing order of osmotic pressure:

(D) < (A) < (B) < (C)