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The statements regarding oxyacids of phosphorous
are
i) HPO₃ molecule is monobasic acid
ii) H₄P₂O₆ molecule has P – P bond
iii) H₄P₂O₇ molecule has P – O – P linkage
The correct combination is

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all are correct

only ii is correct

ii & iii are correct

i & ii are correct

answer is A.

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