Question

Which of the following is an amphoteric hydroxide?
(1) Sr(OH)₂
(2) Ca(OH)₂
(3) Mg(OH)₂
(4) Be(OH)₂

Answer 1

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Answer:

(4) Be(OH)₄

Explanation:

BeO and Be(OH)2 are amphoteric and react with acids and strong bases like NaOH, to form salt and water.

whereas other options are alkaline hydroxides

Answer 2

$Be(OH)_{2}$ has amphoteric nature.

Step by step explanation:

• The substance which accepts and donates the proton called amphoteric substances.
• A metal hydroxide reacts with acids as well as bases called an amphoteric hydroxides.
• And these can act as acids as well as bases.
• Beryllium hydroxide reacts with acid as well as bases.

The chemical reaction of barium hydroxide is as follows.

React with acid:

$\bold{Be(OH)_{2}+2HCl\rightarrow BeCl_{2}+2H_{2}O}$

React with base:

$\bold{Be(OH)_{2}+2NaOH\rightarrow Na_{2}[Be(OH)_{4}]}$

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