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  1. The number of degree of freedom for an azeotropic mixture of ethanol and water in vapour-liquid equilibrium, is

    2. A.

     3
    B.

     1
    C.

     2
    D.

     0

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    Answer : Option B

    Explanation :

    For an azeotropic mixture since the composition of a constituent remains same in vapour and liquid one of the variable to define the system reduces.
    So, f=C−∅+2
    Given number of components =2,  number of phases =2
    So, degree of freedom =1

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