JEE Main & Advanced Chemistry Equilibrium Question Bank Common ion effect, Isohydric solutions, Solubility product, Ionic product of water and salt hydrolysis

  • question_answer Which is the correct alternate for hydrolysis constant of \[N{{H}_{4}}CN\]            [CBSE PMT 1989]

    A)                 \[\sqrt{\frac{{{K}_{w}}}{{{K}_{a}}}}\]     

    B)                 \[\frac{{{K}_{w}}}{{{K}_{a}}\times {{K}_{b}}}\]

    C)                 \[\sqrt{\frac{{{K}_{b}}}{c}}\]      

    D)                 \[\frac{{{K}_{a}}}{{{K}_{b}}}\]

    Correct Answer: B

    Solution :

                    \[N{{H}_{4}}CN\] is a salt of weak acid and weak base and thus for it

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