JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Acids and Bases

  • question_answer
    The species among the following, which can act as an acid and a base is                 [AIEEE 2002; KCET 2005]

    A)                 \[HSO_{4}^{-}\]               

    B)                 \[SO_{4}^{2-}\]

    C)                 \[{{H}_{3}}{{O}^{+}}\]   

    D)                 \[C{{l}^{-}}\]

    Correct Answer: A

    Solution :

               The species which can accept as well as donate \[{{H}^{+}}\] can act both as an acid and a base.                    \[\underset{\text{base}}{\mathop{HSO_{4}^{-}}}\,+{{H}^{+}}\]⇌ \[{{H}_{2}}S{{O}_{4}}\]                                 \[\underset{\text{acid}}{\mathop{HSO_{4}^{-}}}\,\] ⇌\[SO_{4}^{2-}+{{H}^{+}}\]


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