Among the given set of oxides the sets in which both the oxides are not amphoteric is/are: $M n_{2} O_{7}, C r O_{3}, C r_{2} O_{3}, C r O, V_{2} O_{5}, V_{2} O_{4}$

V_{2} O_{5}, C r_{2} O_{3}

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M n_{2} O_{7}, C r O_{3}

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C r O, V_{2} O_{4}

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V_{2} O_{5}, V_{2} O_{4}

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Solution

The correct options are
B $M n_{2} O_{7}, C r O_{3}$
C $C r O, V_{2} O_{4}$
D $V_{2} O_{5}, V_{2} O_{4}$
The oxides which can react with both acids and bases are called amphoteric oxide.
Generally transition metal oxides with lower oxidation states are basic. Whereas the oxides with higher oxidation states are acidic. Those with intermediate oxidation states are amphoteric.

Here $V_{2} O_{5}$ and $C r_{2} O_{3}$ are amphoteric oxides
$C r O, V_{2} O_{4}$ are basic oxides
$M n_{2} O_{7}$ and $C r O_{3}$ are acidic oxides.

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Similar questions

Which of the following are amphoteric oxides?

$M n_{2} O_{7}, C r O_{3}, C r_{2} O_{3}, C r O, V_{2} O_{5}, V_{2} O_{4}$

M n_{2} O_{7}, C r O_{3}, C r_{2} O_{3}, C r O, V_{2} O_{5}, V_{2} O_{4}

M n_{2} O_{7}, C r O_{3}, C r_{2} O_{3}, C r O, V_{2} O_{5}, V_{2} O_{4}

M n_{2} O_{7}

V_{2} O_{3}

V_{2} O_{5}

C r_{2} O_{3}, C r O

I)

V_{2} O_{5}

C r_{2} O_{3}

I I)

I I I)

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