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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Critical Thinking

  • question_answer
    The solubility product of Mg\[{{(OH)}_{2}}\]is\[1.2\times {{10}^{-11}}\]. The solubility of this compound in gram per \[100\,c{{m}^{3}}\] of solution is [Roorkee 2000]

    A)                 \[1.4\times {{10}^{-4}}\]              

    B)                 \[8.16\times {{10}^{-4}}\]

    C)                 0.816    

    D)                 1.4

    Correct Answer: B

    Solution :

               \[Mg{{(OH)}^{2}}\] ⇌ \[\underset{(\text{s})}{\mathop{M{{g}^{2+}}}}\,+\underset{{{(2\text{s})}^{2}}}{\mathop{2O{{H}^{-}}}}\,\]                    \[{{K}_{sp}}=4{{S}^{3}}\Rightarrow S=\sqrt[3]{\frac{{{K}_{sp}}}{4}}=\sqrt[3]{\frac{1.2\times {{10}^{-11}}}{4}}\]                                 \[S=8.16\times {{10}^{-4}}\]


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