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 \(\mathrm{MnO}_2\) is	1.	+2
B.	Most stable oxidation state of Mn is	2.	+3
C.	Most stable oxidation state of Mn in oxides is	3.	+4
D.	Characteristic oxidation state of lanthanoids is	4.	+5
		5.	+7

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.