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JEE Main & Advanced JEE Main Solved Paper-2014

  • question_answer
    Resistance of 0.2 M solution of an electrolyte is \[50\Omega .\]The specific conductance of the solution is\[\text{S}{{\text{m}}^{\text{-1}}}\]. The resistance of 0.5 M solution of the same electrolyte is \[280\Omega .\]The molarconductivity of 0.5 M solution of the electrolyte in \[\text{S}\,{{\text{m}}^{\text{2}}}\,\text{mo}{{\text{l}}^{-1}}\] is :   JEE Main  Solved  Paper-2014

    A) \[5\times {{10}^{3}}\]                   

    B) \[5\times {{10}^{2}}\]

    C) \[5\times {{10}^{-4}}\]

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

    Correct Answer: C

    Solution :

    \[{{A}_{m}}=\frac{k\left( s/m \right)}{1000\times Molarity\left( mol/L \right)}=\frac{1}{4\times 1000\times 0.5}\]\[=5\times {{10}^{-4}}S{{m}^{2}}mo{{l}^{-1}}\]                                


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