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Match the following columns:
Column-I Column-II
(a) $H_{4} P_{2} O_{7}$ (p) $P - 0 - P$ linkage is/are present
(b) Hypophosphoric acid (q)Acidic strength of $- OH$ group - acid present in the molecule is same
(c) $H_{3} {PO}_{5}$ (r) Central atom is in its highest oxidation state
(d) $H_{4} P_{2} O_{5}$ (s) All H-atoms are ionisable

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(a-p, s, r, q); (b-q, s); (c-r, q); (d-p, q)

(a-q, p, r, s); (b-r, s); (c-r, s); (d-q, p)

(a-p, q, r, s); (b-q, s); (c-r, s); (d-p, q)

(a-s, q, r, p); (b-r, s); (c-r, q); (d-p, r)

answer is C.

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Detailed Solution

$H_{4} P_{2} O_{7}$ structure is,

In this central atom is in its highest oxidation state and all H-atoms are ionisable.

A mineral acid having phosphorus in the +4 oxidation state is called hypophosphoric acid. Its chemical composition is H₄P₂O₆.
The oxidation state of P is +7 in peroxophosphoric acid.

H₄p₂o₅ structure:

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