Question: Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the__________________?

• 1. Calorific value
• 2. Heat of reaction
• 3. Heat of combustion
• 4. Heat of formation

Question: For a single component two phase mixture, the number of independent variable properties are_________________?

• 1. Two
• 2. One
• 3. Zero
• 4. Three

Question: When a gas in a vessel expands, its internal energy decreases. The process involved is________________?

• 1. Reversible
• 2. Irreversible
• 3. Isothermal
• 4. Adiabatic

Question: The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is__________________?

• 1. ∞
• 2. 1
• 3. 0
• 4. -ve

Question: Enthalpy ‘H’ is defined as___________________?

• 1. H = E – PV
• 2. H = F – TS
• 3. H – E = PV
• 4. None of these

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

• 1. its internal energy (U) decreases and its entropy (S) increases
• 2. U and S both decreases
• 3. U decreases but S is constant
• 4. U is constant but S decreases

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

• 1. More than
• 2. Less than
• 3. Equal to
• 4. Not related to

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

• 1. 0
• 2. 1
• 3. 2
• 4. 3

Question: In a turbine, the fluid expands almost_________________?

• 1. Isothermally
• 2. Isobarically
• 3. Adiabatically
• 4. None of these

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

• 1. Critical
• 2. Boyle
• 3. Inversion
• 4. Reduced