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Q.

Which of the following is the most basic oxide?

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a

${SO}_{3}$

b

${SeO}_{3}$

c

$PoO$

d

$TeO$

answer is C.

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Detailed Solution

In period, from left to right the acidic character increases while on group from top to bottom the acidic character decreases.

Thus in the oxygen family from top to bottom the acidic character decreases.

Therefore the acidic character of dioxides of members of oxygen family decreases in the order:

${SO}_{2} > {SeO}_{2} > {TeO}_{2} > {PoO}_{2}$

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Which of the following is the most basic oxide?