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J & K CET Medical J & K - CET Medical Solved Paper-2006

  • question_answer
    HA is a weak acid. The pH of 0.1 M HA solution is 2. What is the degree of dissociation\[(\alpha )\]of HA?

    A)  0.5                                        

    B)  0.2

    C)  0.1                                        

    D)  0.301

    Correct Answer: C

    Solution :

                    \[\because \] \[pH=2\] \[\therefore \]  \[[{{H}^{+}}]={{10}^{-2}}\]                 \[[{{H}^{+}}]=N.\alpha \]                 \[{{10}^{-2}}=0.1\times \alpha \]                 \[\alpha =\frac{{{10}^{-2}}}{0.1}\]                 \[\alpha =0.1\]


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