Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Periodic Table
Cement is widely used in the construction of buildings. It contains:
1
Calcium silicate
2
Calcium aluminate
3
Calcium sulfoaluminate
4
More than one of the above
5
None of the above