How many electrons are present in Mg2+ ion?
10
11
12
8
How many lone pairs are present in oxygen in the H2O molecule
2
1
0
3
Which is a good conductor of electricity?
NH3
Solid NaCI
Diamond
Molten KCI
How many pairs of electrons are shared between Nitrogen atoms in N2 molecule?
4
How covalent bond is formed
Donation of electrons from one atom to another
Transfer of electrons from one atom to another
Sharing of electrons between the atoms
None of these
Which one of the following can easily become a cation?
CI
N
Ca
F
Which one of the following molecules do not have a coordinate covalent bond?
SO3
CO
KCI
NH4+
How many electrons are needed for oxygen atoms to attain octet electronic configuration in its valence shell?
5
Which one is more electronegative?
O
17th group elements are also known as
Chalcogens
Noble gases
Halogens
Alkaline earth metals
