Which of the following hydroxides of alkaline earth metals is least basic

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Solution

Explanation:
$B e (O H)_{2}$ is least basic.
Down the group basicity of hydroxide increases.
Hence, option (B) is correct.

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Which of the following hydroxides of alkaline earth metals is least basic

Explanation:Be(OH)2 is least basic. Down the group basicity of hydroxide increases. Hence, option (B) is correct.

Explanation:
$B e (O H)_{2}$ is least basic.
Down the group basicity of hydroxide increases.
Hence, option (B) is correct.