Oxidation numbers

What is the oxidation number of oxygen in ozone molecule

• o

• +1

• -1

• +2

• -2

What is the oxidation number of oxygen in oxide ion?

• 0

• -1

• +1

• -2

• +2

The oxidation number of sodium in sodium chloride is

• 0

• +1

• -1

• -2

• +2

What is the oxidation number of nitrogen in ammonia

• +3

• -3

• +2

• -2

The oxidation number of nitrogen in nitric acid is

• +5

• +3

• +1

• -3

Oxidation number of manganese in MnO4- ion is

• +6

• +7

• +5

• -6

ON of Sn in SnCl4 is

• +1

• -4

• +4

• -1

ON of Mn in MnSO4

• -2

• -1

• 0

• +1

• +2

In CO2, the ON of O is

• +4

• +2

• -4

• -2

A redox reaction involves

• Increase and decrease in oxidation number

• transfer of electrons

• neutralization of hydrogen ions

• Reaction with oxygen