## Which of the following is not correct for a reversible adiabatic process ?

Which of the following is not correct for a reversible adiabatic process ?

A. TVγ-1 = constant
B. p1-γ.TY = constant
C. PVγ = constant
D. None of these

## Equation which relates pressure, volume and temperature of a gas is called the__________________?

Equation which relates pressure, volume and temperature of a gas is called the__________________?

A. Equation of state
B. Gibbs Duhem equation
C. Ideal gas equation
D. None of these

## At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be________________?

At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be________________?

A. More
B. Less
C. Same
D. More or less; depending on the system

## Mollier diagram is a plot of___________________?

Mollier diagram is a plot of___________________?

A. Temperature vs. enthalpy
B. Temperature vs. enthalpy
C. Entropy vs. enthalpy
D. Temperature vs. internal energy

## The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the ____________ temperature?

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the ____________ temperature?

A. Critical
B. Boyle
C. Inversion
D. Reduced

## Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are_______________?

Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are_______________?

A. Always greater than one
B. Same at the same reduced temperature
C. Same at the same reduced pressure
D. Both B. & C

## In a turbine, the fluid expands almost_________________?

In a turbine, the fluid expands almost_________________?

A. Isothermally
B. Isobarically
D. None of these

## The number of degrees of freedom at the triple point of water is__________________?

The number of degrees of freedom at the triple point of water is__________________?

A. 0
B. 1
C. 2
D. 3

## The chemical potential for a pure substance is ____________ its partial molal free energy?

The chemical potential for a pure substance is ____________ its partial molal free energy?

A. More than
B. Less than
C. Equal to
D. Not related to

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

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

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