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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Analyzing +4 | -1

The amphoteric oxide among

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

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

and

\mathrm{V}_2 \mathrm{O}_5

upon reaction with alkali leads to formation of an oxide anion. The oxidation state of V in the oxide anion is:

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Correct option: C

5

Option C (5) is correct because the amphoteric oxide

\mathrm{V}_2\mathrm{O}_5

reacts with alkali to form

\mathrm{VO}_4^{3-}

, where the oxidation state of V is +5.

More Questions from d & f- BLOCK ELEMENTS

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Mercury is transported in metal containers made of: Cadmipone is a mixture of: The number of element from the following that do not belong to lanthanoids is :
Eu, Cm, Er, Tb, Yb and Lu Statement-I:

{Sm}^{3+}

{Dy}^{3+}

have same colour (yellow).

Statement-II: Both ions are having same number of unpaired electrons. The most common oxidation state of Lanthanoid
elements is +3. Which of the following is likely to
also form other oxidation state? A mixture of

\mathrm{Ti}{\mathrm{O}_2}

\mathrm{BaS}{\mathrm{O}_4}