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Chemical Engineering :: Process Control and Instrumentation

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

  2. 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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  3. With increase in temperature, the internal energy of a substance

  4. A.
    increases
    B.
    decreases
    C.
    remains unchanged
    D.
    may increase or decrease; depends on the substance

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  5. It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.

  6. A.
    The amount of work needed is path dependent.
    B.
    Work alone can not bring out such a change of state.
    C.
    The amount of work needed is independent of path.
    D.
    More information is needed to conclude anything about the path dependence or otherwise of the work needed.

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  7. For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

  8. A.
    Cv.dT
    B.
    Cp.dT
    C.
    D.

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