Question

Choose the correct statement among the following ?

• A. Alkali metals react with $H_2$ to form hydrides
• B. Alkali metal hydrides are ionic solid
• C. Alkali metals can react with halogens
• D. All of the above

Answer 1

The correct option is D All of the above

Alkali metals react with $H_2$ at about 673 K (Li at 1073 K) to form hydrides.
All the metal hydrides are ionic solid with high melting points.
The alkali metals readily react vigorously with halogens to form ionic halide, MX eexcept lithium which also forms covalent halides.
$2M+X_2\to 2MX$
Hence all statements are true.