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JEE Main & Advanced Sample Paper JEE Main Sample Paper-7

  • question_answer
    Solubility of \[A{{g}_{2}}Cr{{O}_{4}}\] in water is \[2\times {{10}^{-3}}\,\text{mol}\,\text{1}{{\text{t}}^{-1}}\]. Solubility product of \[A{{g}_{2}}Cr{{O}_{4}}\] is

    A)  \[3.2\times {{10}^{-8}}\]                             

    B)  \[4\times {{10}^{-6}}\]

    C)  \[4\times {{10}^{-9}}\]                 

    D)  \[3.2\times {{10}^{-9}}\]

    Correct Answer: A

    Solution :

    \[A{{g}_{2}}Cr{{O}_{4(s)}}\,2A{{g}^{+}}+CrO_{4}^{2-}\] \[{{K}_{sp}}=4{{S}^{3}}=4\times {{(2\times {{10}^{-3}})}^{3}}=3.2\times {{10}^{-8}}\]


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