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  • Which of the following acids forms three series of salts? (i) H_{3}PO_{2} (ii) H_{3}BO_{3} (iii) H_{3}PO_{4} (iv) H_{3}PO_{3}

Which of the following acids forms three series of salts?

(i) H_{3}PO_{2}

(ii) H_{3}BO_{3}

(iii) H_{3}PO_{4}

(iv) H_{3}PO_{3}

Answers (1)

The answer is the option (iii) H_{3}PO_{4}

There are 3 ionisable H-atoms in  H_{3}PO_{4} as it has 3- OH groups. Thus, it forms three series of salts are as follows: .
NaH_{2}PO_{4}, NaHPO_{4}\; and \; Na_{3}PO_{4}.

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