Metals react with oxygen to form their oxides which are generally ________.

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basic in nature

acidic in nature

neutral in

none of these

answer is C.

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Detailed Solution

Metallic oxides are basic in nature because they react with water to form hydroxide ions, which increase the pH of the solution.

When a metallic oxide, such as sodium oxide (Na2O) or calcium oxide (CaO), is dissolved in water, it reacts with the water molecules to form hydroxide ions (OH^-) according to the following equation:

M₂O + H2O → 2MOH

where M is a metal atom.

The hydroxide ions produced in this reaction increase the concentration of hydroxide ions in the solution, making it basic.

The basicity of metallic oxides is due to the presence of metal ions in the oxide. Metal ions have a tendency to donate electrons and form cations, which can react with water to form hydroxide ions. The basicity of metallic oxides increases with the charge and size of the metal ion.

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