Question

Out of $LiH,Mg{H}_2$ and $CuH$.

• A. All are ionic hydrides
• B. $LiH,Mg{H}_2$ are ionic and $CuH$ is covalent hydride
• C. All are covalent hydrides
• D. $LiH$ and $Mg{H}_2$ are ionic hydride and $CuH$ is Intermediate hydride

Answer 1

The correct option is A All are ionic hydrides

alkali and alkaline earth metals form ionic hydrides when treated with hydrogen. Borderline hydrides exhibit bonding characteristics between ionic and covalent bond types. A specific example of a borderline hydride $CuH$ is an ionic hydride, copper hydride, that appears as a spongy reddish-brown substance is a moderate reducing agent.