Question: Mollier diagram is a plot of___________________?

• 1. Temperature vs. enthalpy
• 2. Temperature vs. enthalpy
• 3. Entropy vs. enthalpy
• 4. Temperature vs. internal energy

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

• 1. More
• 2. Less
• 3. Same
• 4. More or less; depending on the system

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

• 1. Equation of state
• 2. Gibbs Duhem equation
• 3. Ideal gas equation
• 4. None of these

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

• 1. TVγ-1 = constant
• 2. p1-γ.TY = constant
• 3. PVγ = constant
• 4. None of these

Question: Pick out the correct statement?

• 1. A real gas on expansion in vacuum gets heated up
• 2. An ideal gas on expansion in vacuum gets cooled
• 3. An ideal gas on expansion in vacuum gets heated up
• 4. A real gas on expansion in vacuum cools down whereas ideal gas remains unaffected

Question: Pick out the wrong statement?

• 1. Trouton’s ratio of non-polar liquids is calculated using Kistyakowsky equation
• 2. Thermal efficiency of a Carnot engine is always less than 1
• 3. An equation relating pressure, volume and temperature of a gas is called ideal gas equation
• 4. None of these

Question: Pick out the wrong statement ?

• 1. Enthalpies of all elements in their standard states are assumed to be zero
• 2. Combustion reactions are never endothermic in nature
• 3. Heat of reaction at constant volume is equal to the change in internal energy
• 4. Clausius-Clapeyron equation is not applicable to melting process

Question: Pick out the wrong statement?

• 1. The net change in entropy in any reversible cycle is always zero
• 2. The entropy of the system as a whole in an irreversible process increases
• 3. The entropy of the universe tends to a maximum
• 4. The entropy of a substance does not remain constant during a reversible adiabatic change

Question: Pick out the correct statement ?

• 1. In an isothermal system, irreversible work is more than reversible work
• 2. Under reversible conditions, the adiabatic work is less than isothermal work
• 3. Heat, work, enthalpy and entropy are all ‘state functions’
• 4. Matter and energy cannot be exchanged with the surroundings in a closed system

Question: Pick out the extensive property out of the following ?

• 1. Surface tension
• 2. Free energy
• 3. Specific heat
• 4. Refractive index