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  1. Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be

    2. A.

     Same
    B.

     Doubled
    C.

     Halved
    D.

     One fourth of its original value

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    Answer : Option A

    Explanation :

    Consider an elementary reaction A⇔B   and let equilibrium concentrations of A and B be Ca and Cb,
    So equilibrium constant (K) is K1=CbCa
    When the concentrations of both the species doubled equilibrium constant becomes K=2Cb2Ca⇒K=K1.     Hence remains constant.

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