Which of the following are basic oxides?
$M n_{2} O_{7}$ , $V_{2} O_{3}$ , $V_{2} O_{5}$ , $C r_{2} O_{3}, C r O$

M n_{2} O_{7}

and

V_{2} O_{3}

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V_{2} O_{3}

and

C r O

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C r O

and

C r_{2} O_{3}

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V_{2} O_{5}

and

V_{2} O_{3}

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Solution

The correct option is B $V_{2} O_{3}$ and $C r O$
As metallic character decreases as we move across the period then basicity of oxides increases.
Also, we know oxide in lowest oxidation state of element is more basic. So, in $V_{2} O_{3}$ and $C r O$ , oxidation state of $V$ and $C r$ are $+ 3$ and $+ 2$ respectively which is lowest among others.

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

H_{2} (g) + V_{2} O_{5} (s) \to V_{2} O_{3} (s) + H_{2} O (l)

w H_{2} (g) + x V_{2} O_{5} (s) \to y V_{2} O_{3} (s) + z H_{2} O (l)

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