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NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    Which is true for the acids of phosphorus, \[{{H}_{3}}P{{O}_{2}}\,,{{H}_{3}}P{{O}_{4}}\], and \[{{H}_{3}}P{{O}_{4}}\] is:

    A) Order of their acidity is \[{{H}_{3}}P{{O}_{4}}>{{H}_{3}}PO>{{H}_{3}}P{{O}_{3}}>{{H}_{3}}P{{O}_{2}}\]

    B) All are reducing in nature

    C) All are tribasic acids

    D) The geometry of phosphorus is tetrahedral in all the three

    Correct Answer: A

    Solution :

    [a] Acidity order \[{{H}_{3}}P{{O}_{4}}>{{H}_{3}}P{{O}_{3}}>{{H}_{3}}P{{O}_{2}}\] \[{{H}_{3}}P{{O}_{2}}\]is a good reducing agent. \[{{H}_{3}}P{{O}_{2}}\] is dibasic (O.S +3) \[{{H}_{3}}P{{O}_{2}}\]is monobasic (O.S +1) \[{{H}_{3}}P{{O}_{4}}\] is tribasic (O.S +5). It is oxoacid. Higher the oxidation state (O.S), higher will be the acidity.


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