Question

__________ is a monacidic base whereas __________ is a diacidic base.

• A. $KOH,Mg(OH{)}_2$
  
• B. $KOH,Fe(OH{)}_3$
• C. $Mg(OH{)}_2,KOH$
• D. none of the above

Answer 1

The correct option is A $KOH,Mg(OH{)}_2$

Bases which produces two hydroxide ions in aqueous solutions are called di acidic bases.

Example: $Ca(OH{)}_2,Mg(OH{)}_2$, etc.

Bases which produces only one hydroxide$\left(O{H}^{-}\right)$ ion in aqueous solutions are called monoacidic bases.

Example: $NaOH,KOH$, etc.