Thermodynamics For Chemical MCQs

Option A: Fugacity

Option B: Activity co-efficient

Option C: Free energy

Option D: All A, B. & C

Correct Answer: D. All A, B. & C ✔

Option A: Steam to ethylene ratio

Option B: Temperature

Option C: Pressure

Option D: None of these

Correct Answer: None of these ✔

Option A: Melting of ice

Option B: Condensation of alcohol vapor

Option C: Sudden bursting of a cycle tube

Option D: Evaporation of water

Correct Answer: Sudden bursting of a cycle tube ✔

Option A: Pressure to critical pressure

Option B: Critical pressure to pressure

Option C: Pressure to pseudocritical pressure

Option D: Pseudocritical pressure to pressure

Correct Answer: Pressure to critical pressure ✔

Option A: Increase

Option B: Decrease

Option C: No change

Option D: None of these

Correct Answer: Increase ✔

Option A: 3

Option B: 1

Option C: 2

Option D: 0

Correct Answer: 1 ✔

Option A: 0°C and 750 mm Hg

Option B: 15°C and 750 mm Hg

Option C: 0°C and 1 kgf/cm2

Option D: 15°C and 1 kgf/cm2

Correct Answer: 0°C and 750 mm Hg ✔

Option A: Molar volume, density, viscosity and boiling point

Option B: Refractive index and surface tension

Option C: Both A. and B

Option D: None of these

Correct Answer: C. Both A. and B ✔

Option A: Temperature

Option B: Mass

Option C: Volume

Option D: Pressure

Correct Answer: Temperature ✔

B. With increase in temperature, the equilibrium constant increases for an exothermic reaction
C. The equilibrium constant of a reaction depends upon temperature only
D. The conversion for a gas phase reaction increases with increase in pressure, if there is a
decrease in volume accompanying the reaction

Correct Answer: With increase in temperature, the equilibrium constant increases for an exothermic reaction ✔

A. 0
B. 0
D. A function of pressure

Correct Answer: 0 ✔

Option A: Matter

Option B: Energy

Option C: Neither matter nor energy

Option D: Both matter and energy

Correct Answer: Neither matter nor energy ✔

Option A: Solids

Option B: Liquids

Option C: Gases

Option D: All (A), B. & (C)

Correct Answer: Solids ✔

Option A: μi = (∂F/∂ni)T, P, ni

Option B: μi = (∂A/∂ni)T, P, ni

Option C: μi = (∂F/∂ni)T, P

Option D: μi = (∂A/∂ni)T, P

Correct Answer: μi = (∂F/∂ni)T, P, ni ✔

Option A: (T2 – T1)/T2

Option B: (T2 – T1)/T1

Option C: (T1 – T2)/T2

Option D: (T1 – T2)/T1

Correct Answer: A. (T2 – T1)/T2 ✔

Option A: Phase rule variables are intensive properties

Option B: Heat and work are both state function

Option C: The work done by expansion of a gas in vacuum is zero

Option D: CP and CV are state function

Correct Answer: Heat and work are both state function ✔

Option A: The distribution law

Option B: Followed from Margules equation

Option C: A corollary of Henry’s law

Option D: None of these

Correct Answer: The distribution law ✔

Option A: T

Option B: T and P

Option C: T, P and Z

Option D: T and Z

Correct Answer: T ✔

Option A: Turbine

Option B: Heat engine

Option C: Reversed heat engine

Option D: None of these

Correct Answer: Reversed heat engine ✔

Option A: F = E – TS

Option B: F = H – TS

Option C: F = H + TS

Option D: F = E + TS

Correct Answer: B. F = H – TS ✔

Option A: Internal energy

Option B: Enthalpy

Option C: Gibbs free energy

Option D: Helmholtz free energy

Correct Answer: Gibbs free energy ✔

Option A: Pressure must be kept below 5.2 atm

Option B: Temperature must be kept above – 57°C

Option C: Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C

Option D: Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively

Correct Answer: D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively ✔

A. 1
B. 1
D. Either B. or C, depends on the nature of the gas

Correct Answer: D. Either B. or C, depends on the nature of the gas ✔

Option A: In which there is a temperature drop

Option B: Which is exemplified by a non-steady flow expansion

Option C: Which can be performed in a pipe with a constriction

Option D: In which there is an increase in temperature

Correct Answer: Which can be performed in a pipe with a constriction ✔

Option A: Le-Chatelier principle

Option B: Kopp’s rule

Option C: Law of corresponding state

Option D: Arrhenius hypothesis

Correct Answer: Le-Chatelier principle ✔

Option A: Henry’s law

Option B: Law of mass action

Option C: Hess’s law

Option D: None of these

Correct Answer: Law of mass action ✔

Option A: 0

Option B: > 0

Option C: < 0

Option D: None of these

Correct Answer: 0 ✔

Option A: Prediction of the extent of a chemical reaction

Option B: Calculating absolute entropies of substances at different temperature

Option C: Evaluating entropy changes of chemical reaction

Option D: Both B. and C.

Correct Answer: D. Both B. and C. ✔

Option A: Molecular size

Option B: Volume

Option C: Pressure

Option D: Temperature

Correct Answer: Temperature ✔

Option A: The statement as per Gibbs-Helmholtz

Option B: Called Lewis-Randall rule

Option C: Henry’s law

Option D: None of these

Correct Answer: Called Lewis-Randall rule ✔

Option A: Volume

Option B: Mass

Option C: Critical temperature

Option D: None of these

Correct Answer: None of these ✔

Option A: Low temperature and high pressure

Option B: Low temperature and low pressure

Option C: High temperature and high pressure

Option D: High temperature and low pressure

Correct Answer: Low temperature and high pressure ✔

A. ds = 0
B. ds 0
D. ds = Constant

Correct Answer: ds = 0 ✔

Option A: Not liquify (barring exceptions)

Option B: Immediately liquify

Option C: Never liquify however high the pressure may be

Option D: None of these

Correct Answer: Never liquify however high the pressure may be ✔

Option A: Reversible isothermal volume change

Option B: Heating of a substance

Option C: Cooling of a substance

Option D: Simultaneous heating and expansion of an ideal gas

Correct Answer: Simultaneous heating and expansion of an ideal gas ✔

Option A: Increases

Option B: Decreases

Option C: Remain same

Option D: Decreases linearly

Correct Answer: Increases ✔

Option A: Expansion of an ideal gas against constant pressure

Option B: Atmospheric pressure vaporisation of water at 100°C

Option C: Solution of NaCl in water at 50°C

Option D: None of these

Correct Answer: Solution of NaCl in water at 50°C ✔

Option A: Initial concentration of the reactant

Option B: Pressure

Option C: Temperature

Option D: None of these

Correct Answer: Temperature ✔

Option A: Always exists

Option B: May exist

Option C: Never exists

Option D: Is difficult to predict

Correct Answer: Always exists ✔

Option A: Decrease in temperature

Option B: Increase in temperature

Option C: No change in temperature

Option D: Change in temperature which is a function of composition

Correct Answer: Increase in temperature ✔

Option A: Internal energy

Option B: Enthalpy

Option C: Entropy

Option D: All (A), B. & (C)

Correct Answer: Enthalpy ✔

Option A: 0

Option B: ∞

Option C: + ve

Option D: – ve

Correct Answer: D. – ve ✔

Option A: Not a function of its pressure

Option B: Not a function of its nature

Option C: Not a function of its temperature

Option D: Unity, if it follows PV = nRT

Correct Answer: Not a function of its pressure ✔

Option A: Pressure

Option B: Composition

Option C: Temperature

Option D: All (A), B. and (C)

Correct Answer: D. All (A), B. and (C) ✔

Option A: Heat capacity

Option B: Molal heat capacity

Option C: Pressure

Option D: Concentration

Correct Answer: Heat capacity ✔

Option A: Isobaric

Option B: Isothermal

Option C: Isentropic

Option D: Isometric

Correct Answer: Isobaric ✔

Option A: Pressure

Option B: Solubility

Option C: Temperature

Option D: None of these

Correct Answer: None of these ✔

Option A: Moisture free ice

Option B: Solid helium

Option C: Solid carbon dioxide

Option D: None of these

Correct Answer: Solid carbon dioxide ✔

Option A: 1

Option B: < 1

Option C: > 1

Option D: >> 1

Correct Answer: 1 ✔

Option A: 300 × (32/7)

Option B: 300 × (33/5)

Option C: 300 × (333/7)

Option D: 300 × (35/7)

Correct Answer: 300 × (32/7) ✔

Option A: 1

Option B: 2

Option C: 3

Option D: 0

Correct Answer: 2 ✔

Option A: Temperature only

Option B: Temperature and pressure only

Option C: Temperature, pressure and liquid composition xi only

Option D: Temperature, pressure, liquid composition xi and vapour composition yi

Correct Answer: Temperature, pressure and liquid composition xi only ✔

Option A: Fugacity

Option B: Partial pressure

Option C: Activity co-efficient

Option D: All (A), (B), and (C)

Correct Answer: All (A), (B), and (C) ✔

A. (dF)T, p 0
C. (dF)T, p = 0
D. (dA)T, v < 0

Correct Answer: (dF)T, p = 0 ✔

Option A: Air compressor

Option B: Liquid cooling system of an automobile

Option C: Boiler

Option D: None of these

Correct Answer: Liquid cooling system of an automobile ✔

Option A: Rate of heat transmission

Option B: Initial state only

Option C: End states only

Option D: None of these

Correct Answer: End states only ✔

Option A: At low temperature and high pressure

Option B: At standard state

Option C: Both A. and B

Option D: In ideal state

Correct Answer: C. Both A. and B ✔

Option A: Increases with rise in pressure

Option B: Decreases with rise in pressure

Option C: Is independent of pressure

Option D: Is a path function

Correct Answer: Is independent of pressure ✔

Option A: Rate of change of vapour pressure with temperature

Option B: Effect of an inert gas on vapour pressure

Option C: Calculation of ΔF for spontaneous phase change

Option D: Temperature dependence of heat of phase transition

Correct Answer: Rate of change of vapour pressure with temperature ✔

Option A: Value of absolute entropy

Option B: Energy transfer

Option C: Direction of energy transfer

Option D: None of these

Correct Answer: Value of absolute entropy ✔

Option A: In standard state

Option B: At high pressure

Option C: At low temperature

Option D: In ideal state

Correct Answer: In ideal state ✔

Option A: Departure from ideal solution behaviour

Option B: Departure of gas phase from ideal gas law

Option C: Vapour pressure of liquid

Option D: None of these

Correct Answer: Departure from ideal solution behaviour ✔

Option A: Volume

Option B: Enthalpy

Option C: Both A. & B

Option D: Neither A. nor B

Correct Answer: C. Both A. & B ✔

Option A: Ideal

Option B: Very high pressure

Option C: Very low temperature

Option D: All of the above

Correct Answer: Ideal ✔

Option A: d ln p/dt = Hvap/RT2

Option B: d ln p/dt = RT2/Hvap

Option C: dp/dt = RT2/Hvap

Option D: dp/dt = Hvap/RT2

Correct Answer: d ln p/dt = Hvap/RT2 ✔

Option A: Positive

Option B: Negative

Option C: Zero

Option D: Infinity

Correct Answer: Zero ✔

Option A: Adiabatic process

Option B: Isothermal process

Option C: Isobaric process

Option D: All require same work

Correct Answer: Adiabatic process ✔

Option A: Mole fraction

Option B: Fugacity at the same temperature and pressure

Option C: Partial pressure

Option D: None of these

Correct Answer: Mole fraction ✔

Option A: 0

Option B: 1

Option C: 2

Option D: 3

Correct Answer: 1 ✔

Option A: Pressure remains constant

Option B: Pressure is increased

Option C: Temperature remains constant

Option D: None of these

Correct Answer: None of these ✔

Option A: Representing actual behaviour of real gases

Option B: Representing actual behaviour of ideal gases

Option C: The study of chemical equilibria involving gases at atmospheric pressure

Option D: None of these

Correct Answer: Representing actual behaviour of real gases ✔

Option A: Any

Option B: A perfect

Option C: An easily liquefiable

Option D: A real

Correct Answer: A perfect ✔

Option A: Evaporation

Option B: Liquid extraction

Option C: Drying

Option D: Distillation

Correct Answer: Liquid extraction ✔

Option A: Pressure

Option B: Temperature

Option C: Composition

Option D: All A, B. and C

Correct Answer: Temperature ✔

Option A: A . x22

Option B: Ax1

Option C: Ax2

Option D: Ax12

Correct Answer: A . x22 ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

Option D: Data insufficient, can’t be predicted

Correct Answer: Remains unchanged ✔

Option A: Low T, low P

Option B: High T, high P

Option C: Low T, high P

Option D: High T, low P

Correct Answer: High T, low P ✔

Option A: Indeterminate

Option B: Zero

Option C: Negative

Option D: None of these

Correct Answer: Zero ✔

Option A: Decrease in velocity

Option B: Decrease in temperature

Option C: Decrease in kinetic energy

Option D: Energy spent in doing work

Correct Answer: Energy spent in doing work ✔

Option A: Triple point

Option B: Boiling point

Option C: Below triple point

Option D: Always

Correct Answer: Triple point ✔

Option A: Two isothermal and two isentropic

Option B: Two isobaric and two isothermal

Option C: Two isochoric and two isobaric

Option D: Two isothermals and two isochoric

Correct Answer: Two isothermal and two isentropic ✔

Option A: Lewis-Randall rule

Option B: Statement of Van’t Hoff Equation

Option C: Le-Chatelier’s principle

Option D: None of these

Correct Answer: None of these ✔

Option A: Expansion in an engine

Option B: Following a constant pressure cycle

Option C: Throttling

Option D: None of these

Correct Answer: Expansion in an engine ✔

Option A: Rectangle

Option B: Rhombus

Option C: Trapezoid

Option D: Circle

Correct Answer: Rectangle ✔

Option A: Polar

Option B: Non-polar

Option C: Both A. & B

Option D: Neither A. nor B

Correct Answer: Non-polar ✔

Option A: 30554

Option B: 10373

Option C: 4988.4

Option D: 4364.9

Correct Answer: 10373 ✔

Option A: 0

Option B: 1

Option C: ∞

Option D: None of these

Correct Answer: 1 ✔

Option A: 349

Option B: 651

Option C: 667

Option D: 1000

Correct Answer: 349 ✔

Option A: 3

Option B: 4

Option C: 5

Option D: 6

Correct Answer: 3 ✔

Option A: Enthalpy does not remain constant

Option B: Entire apparatus is exposed to surroundings

Option C: Temperature remains constant

Option D: None of these

Correct Answer: None of these ✔

Option A: Volume

Option B: Pressure

Option C: Temperature

Option D: All a, b & c

Correct Answer: Volume ✔

Option A: (∂E/∂T)V

Option B: (∂E/∂V)T

Option C: (∂E/∂P)V

Option D: (∂V/∂T)P

Correct Answer: (∂E/∂T)V ✔

Option A: Maxwell’s equation

Option B: Thermodynamic equation of state

Option C: Equation of state

Option D: Redlich-Kwong equation of state

Correct Answer: Thermodynamic equation of state ✔

Option A: P1ACBP2P1

Option B: ACBB1A1A

Option C: ACBDA

Option D: ADBB1A1A

Correct Answer: ACBDA ✔

Option A: Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero

Option B: Melting of ice involves increase in enthalpy and a decrease in randomness

Option C: The internal energy of an ideal gas depends only on its pressure

Option D: Maximum work is done under reversible conditions

Correct Answer: Maximum work is done under reversible conditions ✔

Option A: [∂(G/T)/∂T] = – (H/T2)

Option B: [∂(A/T)/∂T]V = – E/T2

Option C: Both A. and B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. and B. ✔

Option A: Zeroth

Option B: First

Option C: Second

Option D: Third

Correct Answer: Second ✔

Option A: Independent of pressure

Option B: Independent of temperature

Option C: Zero at absolute zero temperature for a perfect crystalline substance

Option D: All A, B. & C

Correct Answer: Zero at absolute zero temperature for a perfect crystalline substance ✔

Option A: 50 kcal/hr

Option B: 200 BTU/hr

Option C: 200 BTU/minute

Option D: 200 BTU/day

Correct Answer: 200 BTU/minute ✔

Option A: Expansion valve

Option B: Condenser

Option C: Refrigerator

Option D: Compressor

Correct Answer: Compressor ✔