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Uttarakhand PMT Uttarakhand PMT Solved Paper-2007

  • question_answer
    How many grams of\[Ca{{C}_{2}}{{O}_{4}}\] will dissolve in distilled water to make one litre of saturated solution of it? (\[{{K}_{sp}}\] for\[Ca{{C}_{2}}{{O}_{4}}=2.5\times {{10}^{-9}}mo{{l}^{2}}{{L}^{-2}}\])

    A)  0.0064 g      

    B)  0.1028 g

    C)  0.1280 g      

    D)  0.2056 g

    Correct Answer: A

    Solution :

     \[s=\sqrt{{{K}_{sp}}}=\sqrt{2.5\times {{10}^{-9}}}\] \[=5\times {{10}^{-5}}M\] \[=5\times {{10}^{-5}}\times 128g{{L}^{-1}}\] \[=0.0064\text{ }g\]


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