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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Which of the following is amphoteric oxide?

\mathrm{Mn}_2 \mathrm{O}_7, \mathrm{CrO}_3, \mathrm{Cr}_2 \mathrm{O}_3, \mathrm{CrO}, \mathrm{V}_2 \mathrm{O}_5 \text { and } \mathrm{V}_2 \mathrm{O}_4

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Correct option: A

\mathrm{V}_2 \mathrm{O}_5, \mathrm{Cr}_2 \mathrm{O}_3

Option A (

\mathrm{V}_2 \mathrm{O}_5, \mathrm{Cr}_2 \mathrm{O}_3

) is correct because both vanadium(V) oxide and chromium(III) oxide can react with both acids and bases.

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}