The pair of amphoteric hydroxides is

Options

A. `Be(OH)_(2), Al(OH)_(3)`
B. `Al(OH)_(3), LiOH`
C. `B(OH)_(3), Be(OH)_(2)`
D. `Be(OH)_(2), Mg(OH)_(2)`

Answer

A

Explanation

Beryllium hydroxide and aliminium hydroxide are amphoteric in nature on account of diagonal relationship.
`Be(OH)_(2)+2OH^(-)rarr [Be(OH)_(4)]^(2-)(` beryllate ion `)`
`Be(OH)_(2)+2HCl+2H_(2)O rarr [Be (OH_(2))_(4)]Cl_(2)`
`Al(OH)_(3)+OH^(-)rarr [Al(OH)_(4)]^(-)(` aluminate ion `)`
`Al(OH)_(3)+H_(2)O+3HCl rarr [Al(OH_(2))_(4)]Cl_(3)`