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  4. Which of the following represents the isopolyacid of phosphorus?

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Q. Which of the following represents the isopolyacid of phosphorus?

The p-Block Elements - Part2

Solution:

$H_4P_2O_7$ (pyrophosphoric acid) is a tetrabasic acid i.e., 4 hydroxyl groups are present. Each phosphorus atom lies in same tetrahedral environment, so called isopolyacid.

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