Which of the following hydroxides is amphoteric in nature?

Be(OH)₂

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Ca(OH)₂

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Ba(OH)₂

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Mg(OH)₂

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Solution

The correct option is A
Be(OH)₂

In Chemistry amphoteric means that the compound can act as both acid and base in a particular reaction. Below given are the reactions in which beryllium hydroxide acts as both base and acid respectively.

$B e (O H)_{2} + 2 H C l \to B e C l_{2} + 2 H_{2} O$

$B e (O H)_{2} + 2 N a O H \to N a_{2} B e O_{2} + 2 H_{2} O$

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Q. Among the following compounds, how many are amphoteric in nature?

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