JEE Main & Advanced Sample Paper JEE Main Sample Paper-30

  • question_answer
    The solubility product of \[A{{s}_{2}}{{O}_{3}}\] is \[10.8\times {{10}^{-9}}\]. It is \[50%\] dissociated in saturated solution. The solubility of salt is:

    A)  \[{{10}^{-2}}M\]                            

    B)  \[2\times {{10}^{-2}}M\]

    C) \[5\times {{10}^{-3}}M\]                            

    D) \[5.4\times {{10}^{-9}}M\]

    Correct Answer: B

    Solution :

    \[10.8\times {{10}^{-9}}={{(0.5S\times 2)}^{2}}{{(0.5S\times 3)}^{3}}\] \[\therefore S=2\times {{10}^{-2}}M\]


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