Question

Which metal hydroxide is the most least basic

Answer 1

Answer:

Mg(OH)2

Explanation:

As the ionization enthalpy increases from Mg → Ba, the M – O bond becomes weaker and weaker down the group and hence basicity increases down the group.

Thus, Mg(OH)2 is least basic.

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Answer 2

The least basic metal hydroxide  is Mg(OH)₂

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