Q. How many electron pairs are present in valence shell of oxygen in water molecule?
A) 4
B) 1
C) 2
D) 3
Explanation
(a)
Water molecules has following structure
[image:4_image89.emf]
Therefore, there are 4 pairs of electrons (2 lone pairs and 2-bond pairs) in the valence shell of O-atom in water molecule.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.