NEET (UG) 2023 — Question 72

Which of the following statements are INCORRECT?

A. All the transition metals except scandium form $MO$ oxides which are ionic.

B. The highest oxidation number corresponding to the group number in transition metal oxides is attained in $\mathrm{Sc}_{2} \mathrm{O}_{3}$ to $\mathrm{Mn}_{2} \mathrm{O}_{7}$.

C. Basic character increases from $\mathrm{V}_{2} \mathrm{O}_{3}$ to $\mathrm{V}_{2} \mathrm{O}_{4}$ to $\mathrm{V}_{2} \mathrm{O}_{5}$.

D. $\mathrm{V}_{2} \mathrm{O}_{4}$ dissolves in acids to give $\mathrm{VO}_{4}^{3-}$ salts.

E. $\mathrm{CrO}$ is basic but $\mathrm{Cr}_{2} \mathrm{O}_{3}$ is amphoteric.

In the light of the above statements, choose the most appropriate answer from the options given below: