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Question

Which among the following compounds are formed when an alkali metal reacts with hydrogen and halogen respectively?


A

Metal hydride and metal halide

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B

Metal hydrate and metal halide

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C

Metal hydrate and metal hydrate

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D

Metal hydrate and metal halide

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Solution

The correct option is A

Metal hydride and metal halide


Alkali metals react with hydrogen to form metal hydride(MH) since hydrogen forms a hydride ion(H).

Alkali metals react with halogens to form metal halide(MX) since halogen forms a halide ion(X).

Hydrate means water molecules are associated with the element.


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