Is it true that generally metals form basic oxides?

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True

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answer is A.

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Detailed Solution

The above statement is true.
Metallic oxides are basic in nature because they react with dilute acids to form salt and water. They further react with water to create metal hydroxides, which are naturally alkaline due to the release of OH- ions in the solution. Metals and oxygen react to form simple oxygen compounds. Typically, these substances have ionic properties. When group 1, group 2, and lanthanides interact with dioxygen, they produce basic oxygen compounds. Quite a bit of energy is released when these chemicals are formed. With a few exceptions, these chemicals readily react with water.
Examples: M2O3, MO2, ThO2.
Na2O + H2O → 2NaOH

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