Question

Which of the following pair will not show
common ion effect :

Answer 1

$\huge\frak\red{AnSwer}$

Common ion effect is shown when weak electrolyte and strong electrolyte is mixed . Strong electrolyte has the ion which is common in weak electrolyte and thus option is 3 as all other options has strong electrolyte only .

Answer 2

Explanation:

Common ion effect is observed when a solution of weak electrolyte is mixed with a solution of strong electrolyte which provides an ion common to that provided by a weak electrolyte.

Ammonium hydroxide is a weak electrolyte and ammonium chloride is a strong electrolyte. Ammonium chloride provides ammonium ions common to ammonium hydroxide.

Thus, the pair NH

4

OH+NH

4

Cl shows common ion effect.