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Variable Valency Representing

M is a metal ...

Question

$M$ is a metal above hydrogen in the activity series and its oxide has the formula $M_{2} O$ . This oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context answer the following:
What kind of combination exists between $M$ and $O$ ?

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Solution

It is an electrovalent bond as the bond is formed between a metal and a non metal due to the attraction of oppositely charged ions.

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Variable Valency Representing

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