Which of the following, is the correct order of acidic strength?

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${CO}_{2} > N_{2} O_{5} > {SO}_{3}$

$\begin{aligned} K_{2} O > CaO > MgO \end{aligned}$

$\begin{aligned} {Na}_{2} O > MgO > {Al}_{2} O_{3} \end{aligned}$

${Cl}_{2} O_{7} > {SO}_{3} > P_{4} O_{10}$

answer is A.

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Detailed Solution

The correct ranking of acidic strength is,

${Cl}_{2} O_{7} > {SO}_{2} > P_{4} O_{10}$

On the periodic table, the acidity of oxides rises from left to right while the basicity falls. The basic character of oxides rises as they move down the group and their acidic nature decreases.

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