Which of the following oxides is the least ac | vedclass

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(C) The acidity of oxides of non-metals increases with an increase in the oxidation state of the central atom and decreases down the group due to the

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$As_4O_6$

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(C) The acidity of oxides of non-metals increases with an increase in the oxidation state of the central atom and decreases down the group due to the decrease in electronegativity and increase in metallic character. Comparing the oxidation states: In $P_4O_6$,$P$ is in $+3$ state. In $P_4O_{10}$,$P$ is in $+5$ state. In $As_4O_6$,$As$ is in $+3$ state. In $As_4O_{10}$,$As$ is in $+5$ state. Comparing $P$ and $As$: Phosphorus is more electronegative than Arsenic,so its oxides are more acidic. Comparing oxidation states: Oxides with lower oxidation states are less acidic than those with higher oxidation states. Thus,$As_4O_6$ (where $As$ is in $+3$ state and $As$ is less electronegative than $P$) is the least acidic among the given options.

Which of the following oxides is the least acidic?

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