Q. Which of the following hydroxides is amphoteric in nature?
A) $Be(OH)_{2}$
B) $Mg(OH)_{2}$
C) $Ca(OH)_{2}$
D) $Ba(OH)_{2}$
Explanation
(a)
$Be(OH)_{2}$ has minimum basicity and has amphoteric character as it dissolves both in acid and in alkali.
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Be\left( OH_{2} \right) + 2HCl\ \longrightarrow BeCl_{2} + 2H_{2}O$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Be\left( OH_{2} \right) + 2NaOH\ \longrightarrow Na_{2}BeO_{2} + 2H_{2}O$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.