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Question

Question: On reaction with dihydrogen the alkali metals....

On reaction with dihydrogen the alkali metals.

A

From hydrides which are ionic solids with high melting points.

B

From hydrides which are molecular solids with low melting points

C

From hydrides which are ionic solids with low melting pints.

D

From hydrides which are non – stoichiometric.

Answer

From hydrides which are ionic solids with high melting points.

Explanation

Solution

: Alkali metals react with dihydrogen to form hydrides which are ionic solids with high

melting points. 2M+H2→2M+H−2M + H_{2} \rightarrow 2M^{+}H^{-}