Question:
The correct order of following $3 \mathrm{~d}$ metal oxides, according to their oxidation numbers is :
(a) $\mathrm{CrO}_{3}$
(b) $\mathrm{Fe}_{2} \mathrm{O}_{3}$
(c) $\mathrm{MnO}_{2}$
(d) $\mathrm{V}_{2} \mathrm{O}_{5}$
(e) $\mathrm{Cu}_{2} \mathrm{O}$
Correct Option: , 3
Solution:
So order of oxidation state $\mathrm{a}>\mathrm{d}>\mathrm{c}>\mathrm{b}>\mathrm{e}$