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  1. Degree of freedom of a system consisting of a gaseous mixture of H₂ and NH₃ will be

  2. A.

     0

    B.

     1

    C.

     2

    D.

     3

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  3. A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system

  4. A.

     Its internal energy (U) decreases and its entropy (S) increases

    B.

     U and S both decreases

    C.

     U decreases but S is constant

    D.

     U is constant but S decreases

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  5. The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

  6. A.

     Expansion of a real gas

    B.

     Reversible isothermal volume change

    C.

     Heating of an ideal gas

    D.

     Cooling of a real gas

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  7. For any system, what is the minimum number of degrees of freedom?

  8. A.

     1

    B.

     0

    C.

     2

    D.

     3

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  9. Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants)

  10. A.

     (atm)Δx, when Δx is negative

    B.

     (atm)Δx, when Δx is positive

    C.

     Dimensionless, when Δx = 0

    D.

     (atm)Δx2, when Δx > 0

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  11. Equilibrium constant of a reaction varies with the

  12. A.

     Initial concentration of the reactant

    B.

     Pressure

    C.

     Temperature

    D.

     None of these

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  13. Which of the following will increase the volume of a real gas by four times ?

  14. A.

     Doubling the absolute temperature as well as pressure of the gas

    B.

     Reducing pressure to one fourth at constant temperature

    C.

     Reducing temperature to one fourth at constant pressure

    D.

     Reducing the temperature to half and doubling the pressure

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  15. The accentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr⁻¹ = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of accentric factor is always

  16. A.

     > 2

    B.

     < 1

    C.

     > 1

    D.

     < 3

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  17. The number of degrees of freedom for a mixture of ice and water (liquid) are

  18. A.

     2

    B.

     3

    C.

     1

    D.

     0

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  19. A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount". This is

  20. A.

     The distribution law

    B.

     Followed from Margule's equation

    C.

     A corollary of Henry's law

    D.

     None of these

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