The oxidation number of Platinum (Pt) in PtO2 is _______.

2.
The oxidation number of Chlorine (Cl) in SnCl2 is _______.

:
The oxidation number of Chlorine (Cl) in SnCl2 is _______.

3.
The oxidation number of Beryllium (Be) in BeCl2 is _______.

:
The oxidation number of Beryllium (Be) in BeCl2 is _______.

4.
The oxidation number of Oxygen (O) in Li2O is _______.

:
The oxidation number of Oxygen (O) in Li2O is _______.

5.
The oxidation number of Nitrogen (N) in N2 is _______.

:
The oxidation number of Nitrogen (N) in N2 is _______.

Column B
a.-2
b.+4
c.+2
d.-1
e.0

The oxidation number of Platinum (Pt) in PtO2 is +4.

The oxidation number of Chlorine (Cl) in SnCl2 is -1.

The oxidation number of Beryllium (Be) in BeCl2 is +2.

The oxidation number of Oxygen (O) in Li2O is -2.

The oxidation number of Nitrogen (N) in N2 is 0.