Practice Test: Question Set - 01
1. Pick out the wrong statement.
- (A) A
closed system does not permit exchange of mass with its surroundings but may
permit exchange of energy
- (B) An
open system permits exchange of both mass and energy with its surroundings
- (C) The
term microstate is used to characterise an individual, whereas macro-state is
used to designate a group of micro-states with common characteristics
- (D) None
of the above
2. An ideal monatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram. The work done during the cycle is
- (A) PV
- (B) 2PV
- (C) PV/2
- (D) 0
3. Pick out the wrong statement.
- (A) An
ideal liquid or solid solution is defined as one in which each component obeys
Raoult's law
- (B) If
Raoult's law is applied to one component of a binary mixture; Henry's law or
Raoult's law is applied to the other component also
- (C) Henry's
law is rigorously correct in the limit of infinite dilution
- (D) None of
these
4. Which of the following is an undesirable characteristic of a refrigerant?
- (A) It
should be non-explosive
- (B) It
should have a sub-atmospheric vapor pressure at the temperature in refrigerator
coils
- (C) Its
vapor pressure at the condenser temperature should be very high
- (D) None of
these
5. Work done may be calculated by the expression ∫ p dA for __________ processes.
- (A) Non-flow
reversible
- (B) Adiabatic
- (C) Both (a) and
(b)
- (D) Neither (a)
nor (b)
6. Sound waves propagation in air exemplifies an __________ process.
- (A) Adiabatic
- (B) Isothermal
- (C) Isometric
- (D) None
of these
7. Pick out the correct statement.
- (A) Like
internal energy and enthalpy, the absolute value of standard entropy for
elementary substances is zero
- (B) Melting
of ice involves increase in enthalpy and a decrease in randomness
- (C) The
internal energy of an ideal gas depends only on its pressure
- (D) Maximum
work is done under reversible conditions
8. 1 m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be
- (A) 35 K
- (B) 174 K
- (C) 274 K
- (D) 154 K
9. Pick out the correct statement.
- (A) Entropy
and enthalpy are path functions
- (B) In
a closed system, the energy can be exchanged with the surrounding, while matter
cannot be exchanged
- (C) All
the natural processes are reversible in nature
- (D) Work
is a state function
10. In the reaction; N2 + O2 ⇌ 2NO, increasing the pressure will result in
- (A) Shifting the
equilibrium towards right
- (B) Shifting
the equilibrium towards left
- (C) No
change in equilibrium condition
- (D) None of
these
11. __________ does not change during phase transformation processes like sublimation, melting & vaporisation.
- (A) Entropy
- (B) Gibbs free
energy
- (C) Internal
energy
- (D) All (a), (b)
& (c)
12. At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.
- (A) Increases
- (B) Decreases
- (C) Remains
unchanged
- (D) May
increase or decrease; depends on the gas
13. At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is
- (A) Zero
- (B) One
- (C) Infinity
- (D) Negative
14. Lenz's law results from the law of conservation of
- (A) Mass
- (B) Momentum
- (C) Energy
- (D) None
of these
15. A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by
- (A) P1ACBP2P1
- (B) ACBB’A’A
- (C) ACBDA
- (D) ADBB’A’A