Match List-I with List-II

Choose the correct answer from the options given below:

(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

The correct answer is Option (4) → (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

(A) Benzoic acid in benzene — (III) 0.5

Benzoic acid undergoes dimerization in non-polar solvents like benzene due to hydrogen bonding. Two molecules join to form one single unit (a dimer).

• Since the number of particles is halved, $i = 0.5$.

(B) $K_2SO_4$ (aq) — (I) 3

Potassium sulfate is a strong electrolyte. In an aqueous solution, it dissociates completely into three ions:

$K_2SO_4 \rightarrow 2K^+ + SO_4^{2-}$

• Total particles = 3, so $i = 3$.

(C) Urea (aq) — (IV) 1

Urea ($NH_2CONH_2$) is a non-electrolyte. It dissolves in water as whole molecules and does not undergo dissociation or association.

• Total particles = 1, so $i = 1$.

(D) KOH (aq) — (II) 2

Potassium hydroxide is a strong base and dissociates completely into two ions:

$KOH \rightarrow K^+ + OH^-$

• Total particles = 2, so $i = 2$.