Question

Select the correct statements(s) with respect to oxides and oxoanions of transition metals.

• A. Among oxides of chromium, $CrO$ is basic, $C{r}_2{O}_3$ is amphoteric and $Cr{O}_3$ is acidic
• B. In an oxide, iron shows the highest oxidation state in $F{e}_2{O}_3$.
• C. $Cr$ shows the highest oxidation state of +6 while $Mn$ shows the highest oxidation state of +7.
• D. Vandium (V) oxide does not react with acids but reacts with alkalies only.

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Among oxides of chromium, $CrO$ is basic, $C{r}_2{O}_3$ is amphoteric and $Cr{O}_3$ is acidic

B

In an oxide, iron shows the highest oxidation state in $F{e}_2{O}_3$.

C

$Cr$ shows the highest oxidation state of +6 while $Mn$ shows the highest oxidation state of +7.

(a) and (b) statements are correct. These statements are factual. among the first-row transition metals, $Cr$ shows the highest oxidation state of +6 while $Mn$ shows the highest oxidation state of +7. $K_{2}C{r}_2{O}_7$ and $KMn{O}_4$ are the corresponding compounds.

(d) In $V_2{O}_5$ reacts with alkalies as well as acids to give $V{O}_4^{3-}$ and $V{O}_2^{+}$ respectively.