Basic Chemical Engineering MCQ (Multiple Choice Questions)

Here are 1000 Basic Chemical Engineering MCQ (Chapterwise).

1. What is the unit of specific gravity?
a) Dimensionless
b) m/s2
c) N/m3
d) Kg/m3
View answer

Answer: a
Explanation: Specific gravity of a substance is the ratio of density of the substance and density of a reference substance, so it is dimensionless.

2. Which of the following has the same number of moles as in 398 grams of CuSO4?
a) 35 grams of nitrogen
b) 58.5 grams of Sodium chloride
c) 2 grams of hydrogen
d) 40 grams of oxygen
View Answer

Answer: d
Explanation: Number of moles of CuSO4 = 398/ 159 ≈ 2.5, and number of moles of oxygen = 40/16 = 2.5.

3. What is the specific gravity of 5 Kg of water occupied in 10 m3 with respect to 500 g/m3?
a) 2
b) 5
c) 0.5
d) 1
View answer

Answer: d
Explanation: Specific gravity = (5/10)/0.5 = 1.

4. What is the unit of mole fraction?
a) N/m3
b) m-2
c) Kg/m3
d) None of the mentioned
View answer

Answer: d
Explanation: Since the mole fraction is ratio of the moles of solute and the moles of solution, it has no unit.

5. What is the weight of 10 moles of a mixture with composition 15% O2, 25% SO2, 30% COCl2, 25% SO3 and 5% N2?
a) 564
b) 475
c) 867
d) 719
View answer

Answer: d
Explanation: Molecular weight of mixture = (15*32 + 25*64 + 30*99 + 25*80 + 5*28)/100 = 71.9, => Weight of mixture = 71.9*10 = 719.
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6. What is the 100oC in degree Fahrenheit?
a) 100oF
b) 212oF
c) 460oF
d) 0oF
View answer

Answer: b
Explanation: Temperature = 9(100)/5 + 32 = 212oF.

7. What is the pressure of 1900 Torr in the bar?
a) 2.46
b) 2.87
c) 2.40
d) 2.68
View answer

Answer: c
Explanation: Pressure = 1900/760*100000/101325 = 2.4 bar.

8. Which of the following is not a pressure measuring device?
a) Galvanometer
b) Manometer
c) Barometer
d) None of the mentioned
View answer

Answer: a
Explanation: Galvanometer is used to measure current.

9. Which of the following is used for the pressure measurement of only liquid?
a) Differential Manometer
b) Manometer
c) Piezometer
d) None of the mentioned
View answer

Answer: c
Explanation: Piezometer is a pressure measuring device used to measure the pressure of liquid only.

10. Which of the following is a state function?
a) Entropy
b) Heat
c) Work
d) None of the mentioned
View answer

Answer: a
Explanation: Entropy is a state function as it does not depend on the path of the process.

11. Water boiling in a container is an example of which of the following?
a) Semi-batch
b) Batch
c) Batch & Semi-batch
d) Neither of them
View answer

Answer: d
Explanation: Since nothing is entering in the container but steam is leaving the container, it is neither a batch process nor a semi-batch process.

12. Which of the following is true about limiting reagents?
a) Consumes partially
b) Does not react
c) Consumes completely
d) None of the mentioned
View answer

Answer: c
Explanation: Limiting reagent is the reactant which reacts completely in a reaction.

13. Which of the following composition can be controlled by a bypass stream?
a) Feed
b) Process
c) Exit stream
d) None of the mentioned
View answer

Answer: c
Explanation: Bypass stream can be used to control the composition of a final stream.

14. Which of the following is not true about ideal gas molecules?
a) They do not have attractive forces
b) They have negligible size
c) They move in random motion
d) They do not apply pressure
View answer

Answer: d
Explanation: Ideal gas molecules apply pressure to the walls of a container.
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15. Which of the following is true about compressibility of real gases?
a) Z < 1
b) Z > 1
c) Z = 1
d) Both Z < 1 and Z > 1
View answer

Answer: d
Explanation: For any value of compressibility except 1, the gas is real.

16. Which of the following is not the equation of state?
a) Charles Equation
b) Holborn Equation
c) Peng Robinson Equation
d) Van der Waals Equation
View answer

Answer: a
Explanation: Charles equation is simply P α 1/V which is not the equation of state.

17. A liquid evaporates first at which of the following conditions?
a) Low vapor pressure
b) High attraction forces
c) High boiling point
d) Low attraction forces
View answer

Answer: d
Explanation: A liquid evaporates first at low attraction forces.

18. Which of the following is the property of adsorbtion isotherm?
a) Monotonous
b) Linear
c) Decreasing
d) None of the mentioned
View answer

Answer: a
Explanation: Since the adsorbtion isotherms are always increasing they are monotonous.

19. Which of the following is true for an open system?
a) Non Flow system
b) Flow system
c) Cannot say
d) None of the mentioned
View answer

Answer: b
Explanation: Since matter can come in or out in an open system, it is a flow system.
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20. Which of the following is not the type of energy?
a) Heat
b) Work
c) Enthalpy
d) Entropy
View answer

Answer: d
Explanation: Entropy is not a type of energy.

21. Which of the following a reversible process will involve?
a) Equilibrium transfer of energy
b) Dissipative effects
c) Friction
d) None of the mentioned
View answer

Answer: a
Explanation: Reversible process involves equilibrium transfer of energy.

31. Which of the following is not an example of mechanical energy?
a) Internal energy
b) Potential energy
c) Work
d) Kinetic energy
View answer

Answer: a
Explanation: Internal energy is not a mechanical energy.

22. Which of the following is a feature of process simulator?
a) Import and export data
b) Scheduling of batch operations
c) Equipment sizing functions
d) All of the mentioned
View answer

Answer: d
Explanation: All the options are the features of process simulator.

23. Which of the following is not found in process simulators?
a) Compressors
b) Splitters
c) Heat exchangers
d) None of the mentioned
View answer

Answer: d
Explanation: Heat exchangers, Compressors, Splitters all are found in process simulators.

24. Which of the following cannot be treated as a variable for degrees of freedom calculation?
a) Volume
b) Work
c) Temperature
d) Pressure
View answer

Answer: a
Explanation: Since Volume is an extensive variable, it cannot be treated as a variable for degrees of freedom calculation.

25. Wet-bulb temperature is based on the equilibrium between rates of energy transfer to the bulb and which of the following?
a) Freezing of water
b) Evaporation of water
c) Saturation of water
d) None of the mentioned
View answer

Answer: b
Explanation: Wet-bulb temperature is based on the equilibrium between rates of energy transfer to the bulb and evaporation of water.

26. Which of the following is required for the calculation of heat of reaction in the energy balance?
a) Heat of formation
b) Heat of solution at reference state
c) Heat of dissolution at reference state
d) All of the mentioned
View answer

Answer: d
Explanation: Heat of solution at reference state, Heat of dissolution at reference state and heat of formation all are required in the calculation of Heat of reaction.

27. Which of the following is heat required in phase transitions?
a) Depends on type of phase transition
b) Latent Heat
c) Sensible Heat
d) None of the mentioned
View answer

Answer: b
Explanation: Heat required for phase transitions is latent heat.

28. Which of the following process P-V work in highest?
a) Second derivative is positive
b) Second derivative is zero
c) Second derivative is negative
d) All of the mentioned
View answer

Answer: c
Explanation: Work in highest when the area under the P-V curve is highest, which is when the second derivative of the curve is negative.


Chapterwise Multiple Choice Questions on Basic Chemical Engineering

Basic Chemical Engineering MCQ - Multiple Choice Questions and Answers

Our 1000+ MCQs focus on all topics of the Basic Chemical Engineering subject, covering 100+ topics. This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. You can practice these MCQs chapter by chapter starting from the 1st chapter or you can jump to any chapter of your choice.
  1. Moles, Density & Concentration
  2. Temperature and Pressure
  3. Introduction to Material Balances
  4. A General Strategy for Solving Material Balance Problems and Solving Material Balance Problems for Single Units
  5. The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units
  6. Recycle, Bypass, Purge, Ideal Gases and Real Gases
  7. Real Gases: Equations of State, Single Component Two Phase Systems, Saturation & Condensation
  8. Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria
  9. Liquids and Gases in Equilibrium with Solids and Energy: Terminology, Concepts, and Units
  10. Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes
  11. Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction
  12. Energy Balances that Include the Effects of Chemical Reaction, Ideal Processes, Efficiency and the Mechanical Energy Balance and Heats of Solution and Mixing
  13. Humidity Charts & their Use, Analysis of the Degrees of Freedom in a Steady – State Process, Solving Material and Energy Balances Using Process and Unsteady State Material and Energy Balances

1. Basic Chemical Engineering MCQ on Moles, Density & Concentration

The section contains Basic Chemical Engineering multiple choice questions and answers on concepts of mole, density, specific gravity, flow rate and mass fraction.

  • The Mole
  • Density
  • Specific Gravity
  • Flow Rate
  • Mole Fraction and Mass (Weight) Fraction
  • Analyses of Multicomponent Solutions
  • Concentration
  • 2. Basic Chemical Engineering Multiple Choice Questions on Temperature and Pressure

    The section contains Basic Chemical Engineering questions and answers on concepts of temperature, pressure and differential measurements.

  • Temperature
  • Pressure Units
  • Measurement of Pressure
  • Differential Pressure Measurements
  • 3. Basic Chemical Engineering MCQ on Introduction to Material Balances

    The section contains Basic Chemical Engineering MCQs on concepts of material balances, open and closed systems, material balance chemical reaction, multiple component systems and material balances for batch and semi-batch processes.

  • Material Balance Concept
  • Open and Closed Systems
  • Steady-State and Unsteady-State Systems
  • Multiple Component Systems
  • Accounting for Chemical Reactions
  • Material Balances for Batch Processes
  • 4. Basic Chemical Engineering Multiple Choice Questions on General Strategy for Solving Material Balance Problems and Solving Material Balance Problems for Single Units

    The section contains Basic Chemical Engineering multiple choice questions and answers on problem solving strategy and material balance problem solving for single units.

  • Problem Solving Strategy
  • Solving Material Balance Problems
  • 5. Basic Chemical Engineering MCQ on The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units

    The section contains Basic Chemical Engineering questions and answers on stoichometry, its applications and terminology, element material balances and material species balances and problems that involve multiple units.

  • Stoichiometry
  • Stoichiometry Applications Terminology
  • Species Material Balances
  • Processes Involving Multiple Units
  • Element Material Balances
  • Material Balances Involving Combustion
  • Material Balances Problems
  • 6. Basic Chemical Engineering Multiple Choice Questions on Recycle, Bypass, Purge, Ideal Gases and Real Gases

    The section contains Basic Chemical Engineering MCQs on vapour liquid equilibria, idealities concepts, flash vapourization methods, differential distillation methods, distillation column operation, azeotropic mixture rectification, reflux ratio and its cost variance, various distillation types anf flash vaporization laws.

  • Recycle without Chemical Reaction
  • Recycle with Chemical Reaction
  • Bypass and Purge
  • Ideal Gas Law
  • Ideal Gas Mixtures and Partial Pressure
  • Material Balances Involving Ideal Gases
  • Compressibility
  • 7. Basic Chemical Engineering MCQ on Real Gases: Equations of State, Single Component Two Phase Systems, Saturation & Condensation

    The section contains Basic Chemical Engineering multiple choice questions and answers on state equations, vapor pressure modelling and prediction and the concepts of saturation and condensation.

  • Equations of State
  • Modeling and Predicting Vapor Pressure
  • Saturation
  • Condensation
  • 8. Basic Chemical Engineering Multiple Choice Questions on Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria

    The section contains Basic Chemical Engineering questions and answers on partial saturation terminology, partial saturation material balance problems, gibbs phase rule and vapor liquid equilibria in binary systems.

  • Partial Saturation Terminology
  • Material Balance Problems-Partial Saturation
  • Gibbs Phase Rule
  • Vapor-Liquid Equilibria in Binary Systems
  • 9. Basic Chemical Engineering MCQ on Liquids and Gases in Equilibrium with Solids and Energy: Terminology, Concepts, and Units

    The section contains Basic Chemical Engineering MCQs on energy balance terminology and types and liquids and gases along with solids in equillibrium.

  • Liquids and Gases in Equilibrium with Solids
  • Energy Balances Terminology
  • Energy Types
  • 10. Basic Chemical Engineering Multiple Choice Questions on Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes

    The section contains Basic Chemical Engineering multiple choice questions and answers on potential energy, kinetic energy, internal energy and their conversion concepts, energy balances for open, closed, steady and unsteady state systems, phase transitions and heat capacity equations.

  • Potential Energy and Kinetic Energy
  • Internal Energy and Energy Conversion Concept
  • Energy Balances-Closed, Unsteady-State Systems
  • Energy Balances-Closed, Steady-State Systems
  • Vaporization and Energy Balances
  • Phase Transitions
  • Heat Capacity Equations
  • 11. Basic Chemical Engineering MCQ on Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction

    This section contains Basic Chemical Engineering questions and answers on energy balance simplifications and solving, open and closed energy balance applications, enthalpy of formation and reaction, heat of combustion and the concepts of heat merging.

  • Simplifications of General Energy Balance
  • Solving Energy Balance Problems
  • Energy Balance to Closed Systems
  • Energy Balance to Open Systems
  • Standard Heat (Enthalpy) of Formation
  • Heat (Enthalpy) of Reaction
  • Merging Heat of Formation
  • Heat of Combustion
  • 12. Basic Chemical Engineering Multiple Choice Questions on Energy Balances that Include the Effects of Chemical Reaction, Ideal Processes, Efficiency and the Mechanical Energy Balance and Heats of Solution and Mixing

    The section contains Basic Chemical Engineering MCQs on degrees of freedom and their analysis, energy balance applications, ideal reversible processes and their efficiency, mechanical energy balance, mixing effect into energy balance and heat of solution, dissolution and mixing.

  • Degrees of Freedom Analysis
  • Energy Balances Application in Processes
  • Ideal Reversible Processes
  • Efficiency
  • Mechanical Energy Balance
  • Heat of Solution, Dissolution and Mixing
  • Effects of Mixing into Energy Balance
  • 13. Basic Chemical Engineering MCQ on Humidity Charts & their Use, Analysis of the Degrees of Freedom in a Steady – State Process, Solving Material and Energy Balances Using Process and Unsteady State Material and Energy Balances

    The section contains Basic Chemical Engineering multiple choice questions and answers on humidity chart and its applications, energy balances using process simulators, degrees of freedom analysis and steady and unsteady state materials.

  • Humidity (Psychrometric) Chart
  • Applications of Humidity Chart
  • Degrees of Freedom Analysis
  • Material and Energy Balances-Process Simulators
  • Unsteady-State Material and Energy Balances
  • If you would like to learn "Basic Chemical Engineering" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. It will immensely help anyone trying to crack an exam or an interview.

    Wish you the best in your endeavor to learn and master Basic Chemical Engineering!

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