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Oxides of elements - class-XII
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Which of the following are basic oxides?
$Mn _2O _7$ ,$V _2O _3$, $V _2O _5$, $Cr _2O _3, CrO$
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A
$V _2O _3$ and $CrO$
💡 Explanation:
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 $V _2O _3$ and $CrO$, oxidation state of $V$ and $Cr$ are $+3$ and $+2$ respectively which is lowest among others.