Which of the following statements are INCORRECT? A. All the transition metals except scandium form $\text{MO}$ 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. Choose the correct answer from the options given below:

NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

1 Easy

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Analyzing +4 | -1

Which of the following statements are INCORRECT?
A. All the transition metals except scandium form

\text{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

\mathrm{Mn}_2 \mathrm{O}_7

.
C. Basic character increases from

\mathrm{V}_2 \mathrm{O}_3

\mathrm{V}_2 \mathrm{O}_4

\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.
Choose the correct answer from the options given below:

View answer and explanation

Correct option: A

C and D only

Option A (C and D only) is correct because statements C and D are incorrect regarding the properties of vanadium oxides.