Question
The basic character of the transition metal monoxides follows the order $$\left( {{\text{At}}{\text{. no}}{\text{.}}\,Ti = 22,V = 23,} \right.$$ $$\left. {Cr = 24,Fe = 26} \right)$$
A.
$$TiO > FeO > VO > CrO$$
B.
$$TiO > VO > CrO > FeO$$
C.
$$VO > CrO > TiO > FeO$$
D.
$$CrO > VO > FeO > TiO$$
Answer :
$$TiO > VO > CrO > FeO$$
Solution :
The order of basic character of the transition metal monoxide is $$TiO > VO > CrO> FeO$$ because basic character of oxides decreases with increase in atomic number. Hence, oxides of transitional metals in low oxidation state, i.e. + 2 and + 3 are generally basic except $$C{r_2}{O_3}.$$