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

  • question_answer
    Aqueous solution of \[CuS{{O}_{4}}.5{{H}_{2}}O\] changes blue litmus paper to red due to          [CPMT 1979; MP PMT 1989]

    A)                 Presence of \[C{{u}^{++}}\] ions

    B)                 Presence of \[S{{O}_{4}}^{--}\] ions

    C)                 Hydrolysis taking place

    D)                 Reduction taking place

    Correct Answer: C

    Solution :

               Hydrolysis of \[C{{u}^{2+}}\] produces \[{{H}^{+}}\] ions in solution.                 \[C{{u}^{2+}}+2{{H}_{2}}O\to Cu{{(OH)}_{2}}+2{{H}^{+}}\]


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