JEE Main & Advanced Chemistry Solutions / विलयन Question Bank Method of expressing concentration of solution

  • question_answer
     On dissolving 1 mole of each of the following acids in 1 litre water, the acid which does not give a solution of strength \[1N\] is                                        [MP PET 1993]

    A)                 \[HCl\]    

    B)                 Perchloric acid

    C)                 \[HN{{O}_{3}}\] 

    D)                 Phosphoric acid

    Correct Answer: D

    Solution :

           \[{{H}_{3}}P{{O}_{4}}\]⇌ \[{{H}^{+}}+{{H}_{2}}PO_{4}^{-}\]            \[{{H}_{2}}PO_{4}^{-}\] ⇌ \[{{H}^{+}}+HPO_{4}^{2-}\]            \[HPO_{4}^{2-}\] ⇌ \[{{H}^{+}}+PO_{4}^{3-}\]                 Phosphoric acid does not give 1N strength.


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