How many electron pairs are shared in the formation of oxygen molecule?
1
2
3
4
Electronic configuration of Neon is
2, 8
2, 8, 8
2, 8, 18
How many electrons are there in the outermost shell of an oxygen atom?
6
8
In CCl4, how many covalent bond does Carbon form?
Which one is a non polar molecule?
HF
H2O
NH3
CH4
In the formation of sodium chloride which atom donates the electron?
Na, 1
Na, 7
Cl, 1
Cl, 7
In the following chemical reaction which is the oxidizing agent?
Zn + 2HCl → ZnCl2 + H2
Zn
HCl
ZnCl2
H2
Which loses electrons in a chemical reaction ?
Non-metals
Inert gases
Metals
Halogens
The electronic distribution of nitrogen atom is 2,5. To attain stability, how many electrons does nitrogen need?
5
7
