Q. Which one of the following exist in the oxidation state other than +3?
A) B
B) Al
C) Ce
D) Ga
Explanation
(c)
Boron(B), aluminium(Al) and gallium, (Ga) are present in IIIA group. They show +3 oxidation state. While cerium(Ce) is a lanthanoid. It is present in lanthanide series. It shows +3 and +4 oxidation states.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.