Which one of the following is smallest in size?
Na
Na+
K
Br-
The chemical interaction that binds Na+ and CI- in NaCI molecule is
Covalent bond
Hydrogen bond
ionic bond
Metallic bond
Which one is more electronegative?
Ca
O
N
F
How many pairs of electrons are shared between Nitrogen atoms in N2 molecule?
1
2
3
4
Which one of the following can easily become a cation?
CI
Which is a good conductor of electricity?
NH3
Solid NaCI
Diamond
Molten KCI
Which one of the following molecules do not have a coordinate covalent bond?
SO3
CO
KCI
NH4+
How many electrons are present in the valence shell of sulphur?
6
5
7
How many electrons are needed for oxygen atoms to attain octet electronic configuration in its valence shell?
Which among the following molecules do not obey octet rule
NaCI
CaO
AICI3
BF3
