Question

The chief component of cement is:

• A. $Si{{O}_{2}}$
• B. $CaO$
• C. $A{{l}_{2}}{{O}_{3}}$
• D. none of these

Answer 1

Answer: (B)

$CaO$

Answer 2

The chief component of cement is calcium oxide (CaO), which is found up to an extent of 70%. Besides it.
it contains silica (20%), alumina (5%) and other metal oxides.
So, the correct option is (B): CaO.