Ncert Exercises & Solutions

Match the statements given in Column I with the oxidation states given in Column and mark the correct option.

Column I	Column II
A. Oxidation state of Mn in $M n O_{2}$ is	1. +2 2. +3
B. Most stable oxidation state of Mn is	3. +4
C. Most stable oxidation state of Mn in oxides is	4. +5
D. Characteristic oxidation state of lanthanoids is	5. +7

Codes

Hint: Mn is 3d element and the most stable oxidation state is +2

A. Oxidation state of Mn

{MnO}_{2}

in is + 4.

B. Most stable oxidation state of Mn is +2 because Mn²⁺ has a stable configuration that is 3d⁵.

C. Most stable oxidation state of Mn in oxides is +7.

D. Characteristic oxidation state of lanthanoids is +3.