The weakest acid among the following is :

H_{2} S O_{4}

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H_{2} S O_{3}

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H_{2} S e O_{4}

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H_{2} S e O_{3}

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Solution

The correct option is D $H_{2} S e O_{3}$
Acidity of oxyacids decreasing down the group and acids with higher axidation no of central atom is stronger acid
$∴ H_{2} S O_{4} > H_{2} S O_{3} > H_{2} S e O_{4} > H_{2} S e O_{3}$

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H_{3} P O_{4}, H_{2} S O_{4}, H_{3} P O_{3}, H_{2} C O_{3}, H_{2} S_{2} O_{7}, H_{3} B O_{3}, H_{3} P O_{2}, H_{2} C r O_{4}, H_{2} S O_{3}

H_{3} P O_{4}, H_{2} S O_{4}, H_{3} P O_{3}, H_{2} C O_{3}, H_{2} S_{2} O_{7}, H_{3} B O_{3}, H_{3} P O_{2}, H_{2} C r O_{4}, H_{2} S O_{3}

Which among the following is the weakest acid?

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