Q. Corundum is
A) $Cu_{2}Cl_{2}$
B) $CaCl_{2}$
C) $SrO_{2}$
D) $Al_{2}O_{3}$
Explanation
(c)
Corundum $(Al_{2}O_{3})$ is the combined state of aluminium
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.