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Diya Vaingankar posted an Question
February 02, 2021 • 23:12 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Que:1. the true statements for acid of phosphorous h,po,, hpo, and h,po, is 1) the geometry of p atom is tetrahedral in all three cases 2) the acidic nature is

Que:1. The true statements for acid of phosphorous H,PO,, HPO, and H,PO, is 1) The geometry of P atom is tetrahedral in all three cases 2) The acidic nature is H,P0, H,P0, > H,PO, 3) All of them are tribasic acids 4) All of them are reducing in nature

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    Priyanshu kumar best-answer

    option A

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    Hello , why is option B wrong and what is the correct order of acidity then?

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    This is an exceptional order H3PO3>H3PO2>H3P04.. you have to keep in mind this exception as not suitable explanation of this order is available

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    Oxidation state: Higher the oxidation state greater the acidity so order would be H3PO4>H3PO3>H3PO2. Cross Resonance: greater the number of competing hydroxyl groups in the conjugate base lower is it's stability. So order would be H3PO2>H3PO3>H3PO4. It's a subtle interplay of these two that results in the given order

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