Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table
The valency of Ca is 2+ . The valency of O is 2− . What is the simplified chemical formula of Calcium oxide?
1
Ca2O2
2
CaO
3
CaO2
4
More than one of the above
5
None of the above