Question

Match the following compounds with their corresponding hydride.

• A. $Si{H}_4$
• B. $Al{H}_3$
• C. $HCl$
• D. $La{H}_3$

Answer 1

1. $Si{H}_4$ has the required number of electron for conventional lewis structure. It has neither more electron nor less elctron. Hence it is a electron precise hydride.

2. $Al{H}_3$ is electron deficient compound since its deficit 2 more electron to form conventional lewis structure. Hence it is called electron deficient hydride.

3. Electron rich hydrides have lone pair of electron on the central atom. Cl as 3 lone pair of electron. Hence it is a electron rich hydride.

4. In metallic hydride, hydrogen forms bond with metals. Here H forms bond with Lanthanum metal to form metallic hydride.