Question

The basic character of the transition metal monoxides follows the order (Atomic no's. Ti = 22, V = 23, Cr = 24, Fe = 26)

(a) VO > CrO > TiO > FeO

(b) CrO > VO > FeO > TiO

(c) TiO > FeO > VO > CrO

(d) TiO > VO > CrO > FeO

Answer 1

Correct option (d) TiO > VO > CrO > FeO

Explanation :

Oxides of transition metals in low'oxidation states +2 and +3 (MO, M₃O₄ and M₂O₃) are generally basic except Cr₂O₃ which is amphoteric in character. Basic character generally decreases with increase in atomic number.