Some bases can be prepared by the direct combination of a metal with:

hydrogen

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oxygen

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non-metal

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carbon

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Solution

The correct option is B oxygen
Some bases can be prepared by the direct combination of a metal with oxygen.
Example: $M e t a l + O x y g e n \to B a s e (B a s i c o x i d e)$

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Similar questions

Salts are prepared by the following methods

(a) Direct combination

(b) Displacement

(d) Neutralisation of insoluble base

(e) Neutralisation of an alkali (titration)

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