Q. Cement does not contain
A) Calcium
B) Aluminium
C) Sulphur
D) Iron
Explanation
(c)
Cement is mixture of Ca and Al silicates. It has some $Fe_{2}O_{3}$ also. It does not have sulphur.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.