Q. $N a H$ contains how many covalent bonds?

2011 195 Delhi UMET/DPMTDelhi UMET/DPMT 2007Chemical Bonding and Molecular Structure Report Error

A

zero

55%

B

two

16%

C

one

22%

D

three

7%

Solution:

$N a H$ is ionic hydride $(N a^{+} H^{-})$ Covalent bond is absent.