NEET Sample Paper NEET Sample Test Paper-16

  • question_answer 82) The dissociation constant of two acids \[\text{H}{{\text{A}}_{\text{1}}}\]and \[\text{H}{{\text{A}}_{2}}\]are\[3.0\times {{10}^{-4}}\]and \[1.8\times {{10}^{-5}}\] respectively. The relative strength is

    A)   10 : 1                        

    B)  1 : 12 

    C)       4 : 1                

    D)       1 : 5               

    Correct Answer: C

    Solution :

    \[\frac{\text{Strength of acid H}{{\text{A}}_{\text{1}}}}{\text{Strength of acid H}{{\text{A}}_{\text{2}}}}\sqrt{\frac{{{K}_{1}}}{{{K}_{2}}}}\] \[\sqrt{\frac{3.0\times {{10}^{-4}}}{1.8\times {{10}^{-5}}}}=\frac{4}{1}\] Hence, the correct option is (c).

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