The basic character of the transition metal monoxide follows the order

Question

The basic character of the transition metal monoxide follows the order (A)  VO>CrO>TiO>FeO  (B)  CrO>VO>FeO>TiO  (C)  TiO>FeO>VO>CrO  (D)  TiO>VO>CrO>FeO

Tardigrade Admin · Accepted Answer

Larger the size of a cation, lesser is its polarising power. A cation with lesser polarising power means lesser covalent character or more ionic character of its compound. A metal oxide with more ionic character will be more basic. The correct order of

M^{2 +}

ionic radii is as follows

T i^{2 +} > V^{2 +} > C r^{2 +} > F e^{2 +}

Ionic character of oxides in decreasing order, is as follows

T i O > V O > C r O > F e O

This is also the order of basic character.

Q. The basic character of the transition metal monoxide follows the order

$V O > C r O > T i O > F e O$

$C r O > V O > F e O > T i O$

$T i O > F e O > V O > C r O$

$T i O > V O > C r O > F e O$