Which of the following is correct about acidic nature?

H_{3} P O_{4} > H_{3} P O_{3}

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H_{3} A s O_{4} > H_{3} A s O_{3}

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H C l O_{4} > H C l O_{3}

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H N O_{3} > H N O_{2}

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Solution

The correct options are
A $H_{3} P O_{4} > H_{3} P O_{3}$
B $H_{3} A s O_{4} > H_{3} A s O_{3}$
C $H C l O_{4} > H C l O_{3}$
D $H N O_{3} > H N O_{2}$
As oxidation state of central atom increases, acidity increases.
$H_{3} A s O_{4} > H_{3} A s O_{3}$
+5 +3
The oxidation state of $H_{3} A s O_{4}$ is $+ 5$ which is greater than $+ 3$ for $H_{3} A s O_{3}$ . Hence, $H_{3} A s O_{4}$ is more acidic.
Similarly,
$H_{3} P O_{4}$ > $H_{3} P O_{3}$
+5 +3
$H C l O_{4} > H C l O_{3}$
+7 +5
$H N O_{3} > H N O_{2}$
+5 +3
Hence, all are correct.

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H_{3} P O_{4}

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y

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