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BCECE Engineering BCECE Engineering Solved Paper-2012

  • question_answer
    In the sample of soft drink, the concentration of \[{{\text{H}}^{\text{+}}}\] ion is\[\text{3}\text{.8}\times {{10}^{-3}}M.\]Its pH is

    A)  2                            

    B)         2.42                      

    C)  3                            

    D)         3.42

    Correct Answer: B

    Solution :

    \[pH=-\log [{{H}^{+}}]\] \[pH=-\log [3.8\times {{10}^{-3}}]\] \[pH=-(-3\log 10+\log 3.8)\] \[=+3-0.5798=2.4202\approx 2.42\]


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