Question

Plz answer above question with explanation

Answer 1

Answer:

option (A)

Explanation:

Be is a small relatively high charged ion and the H- ion is very large anion .Each beryllium atom is bonded to two hydrogen atoms .  beryllium has  two valence electrons and hydrogen has one, it is clear that there are no sufficient electrons to form so many electron-pair bonds.

BeH 2 ,  have only four electrons in the valence shell of the beryllium atom and would be electron-deficient and unstable. It polymerizes to remedy the electron deficiency. so it is having a covalent character