Question

24. Ca(OH)₂ is an example of

• A. monoacidic base
• B. diacidic acid
• C. triacidic base
• D. strong base

Answer 1

The correct option is B

diacidic acid

Explanation for correct option:

(B).Diacidic base- The base producing two hydroxide ion(OH^-) on ionization in the solution.

Since Ca(OH)₂ furnishes 2 hydroxide ions (OH^-) in an aqueous solution.

$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{aq}\right)\to {\mathrm{Ca}}^{2+}\left(\mathrm{aq}\right)+2{\mathrm{OH}}^{-}\left(\mathrm{aq}\right)$

Thus, it is a diacidic base.

Explanation for incorrect option:

(A) Mono acidic base- The base producing one hydroxide ion (OH^-) on ionization in the solution. Example: (sodium hydroxide) NaOH

(C) Tri acidic base- The base producing three hydroxide ion(OH^-) on ionization in the solution. Example: (aluminium hydroxide) Al(OH)₃

(D) Strong base- The base that dissociates completely in an aqueous solution. Example: NaOH

Hence, option (B) is the correct answer.