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  1. Van Laar equation deals with the activity co-efficients in

    2. A.

     Binary solutions
    B.

     Ternary solutions
    C.

     Azeotropic mixture only
    D.

     None of these

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    Answer : Option A

    Explanation :

    Van Laar equation is an activity based model developed by Van Laar during 1910-1913. Which will be very useful during vapor-liquid equilibrium calculations and the equations for a binary mixture are given as :
    lnγ1=AX22(AX1B+X2)2lnγ2=BX21(BX2A+X1)2

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