MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 469 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following liquid metals has the highest thermal conductivity?%! |
| A. | Molten sodium |
| B. | Molten lead |
| C. | Mercury |
| D. | Molten potassium |
| Answer» B. Molten lead | |
| 2. |
A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0°C, 760 mm Hg) will be __________ litres.%! |
| A. | 448 |
| B. | 224 |
| C. | 22.4 |
| D. | Data insufficient; can't be computed |
| Answer» B. 224 | |
| 3. |
Heat pump%! |
| A. | Accomplishes only space heating in winter |
| B. | Accomplishes only space cooling in summer |
| C. | Accomplishes both A and B |
| D. | Works on Carnot cycle |
| Answer» D. Works on Carnot cycle | |
| 4. |
If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will |
| A. | Increase |
| B. | Decrease |
| C. | Remain unaltered |
| D. | Increase or decrease ; depends on the particular reaction |
| Answer» D. Increase or decrease ; depends on the particular reaction | |
| 5. |
For an irreversible process involving only pressure-volume work%! |
| A. | (dF)T, p <0 |
| B. | (dF)T, p = 0 |
| C. | (dF)T, p > 0 |
| D. | (dA)T, v >0 |
| Answer» B. (dF)T, p = 0 | |
| 6. |
Which is a state function?%! |
| A. | Specific volume |
| B. | Work |
| C. | Pressure |
| D. | Temperature |
| Answer» C. Pressure | |
| 7. |
In an ideal gas mixture, fugacity of a species is equal to its%! |
| A. | Vapor pressure |
| B. | Partial pressure |
| C. | Chemical potential |
| D. | None of these |
| Answer» C. Chemical potential | |
| 8. |
Absolute zero temperature signifies the%! |
| A. | Minimum temperature attainable |
| B. | Temperature of the heat reservoir to which a Carnot engine rejects all the heat that is taken in |
| C. | Temperature of the heat reservoir to which a Carnot engine rejects no heat |
| D. | None of these |
| Answer» D. None of these | |
| 9. |
The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is%! |
| A. | R loge 4 |
| B. | R log10 4 |
| C. | Cv log10 4 |
| D. | Cv loge 4 |
| Answer» B. R log10 4 | |
| 10. |
In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respetively, the Carnot COP will be%! |
| A. | 5.2 |
| B. | 6.2 |
| C. | 0.168 |
| D. | Data insufficient, can't be found out |
| Answer» B. 6.2 | |
| 11. |
Heat of reaction at constant volume is identified with __________ change.%! |
| A. | Enthalpy |
| B. | Internal energy |
| C. | Either A or B |
| D. | Neither A nor B |
| Answer» C. Either A or B | |
| 12. |
Which of the following has the least thermal efficiency?%! |
| A. | Steam engine |
| B. | Carnot engine |
| C. | Diesel engine |
| D. | Otto engine |
| Answer» B. Carnot engine | |
| 13. |
When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the%! |
| A. | Le-Chatelier principle |
| B. | Kopp's rule |
| C. | Law of corresponding state |
| D. | Arrehenius hypothesis |
| Answer» B. Kopp's rule | |
| 14. |
The number of degrees of freedom at the triple point of water is%! |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 15. |
At absolute zero temperature, the __________ of the gas is zero.%! |
| A. | Pressure |
| B. | Volume |
| C. | Mass |
| D. | None of these |
| Answer» C. Mass | |
| 16. |
A refrigerator works on the principle of __________ law of thermodynamics.%! |
| A. | Zeroth |
| B. | First |
| C. | Second |
| D. | Third |
| Answer» D. Third | |
| 17. |
The first law of thermodynamics is a statement of conservation of%! |
| A. | Heat |
| B. | Momentum |
| C. | Energy |
| D. | Work |
| Answer» D. Work | |
| 18. |
Isentropic process means a constant __________ process.%! |
| A. | Enthalpy |
| B. | Pressure |
| C. | Entropy |
| D. | None of these |
| Answer» D. None of these | |
| 19. |
Enthalpy of a gas depends upon its%! |
| A. | Temperature |
| B. | Mass |
| C. | Volume |
| D. | Pressure |
| Answer» B. Mass | |
| 20. |
Linde gas liquefaction process employs cooling%! |
| A. | By throttling |
| B. | By expansion in an engine |
| C. | At constant pressure |
| D. | None of these |
| Answer» B. By expansion in an engine | |
| 21. |
Clausius - Clayperon equation is applicable to __________ equilibrium processes.%! |
| A. | Solid-vapor |
| B. | Solid-liquid |
| C. | Liquid-vapor |
| D. | All of the above |
| Answer» E. | |
| 22. |
1st law of thermodynamics is nothing but the law of conservation of%! |
| A. | Momentum |
| B. | Mass |
| C. | Energy |
| D. | None of these |
| Answer» D. None of these | |
| 23. |
Solid and liquid phases of a substance are in equilibrium at the%! |
| A. | Critical temperature |
| B. | Melting point |
| C. | Freezing point |
| D. | Both B and C |
| Answer» E. | |
| 24. |
Compressibility factor for almost all the gases are approximately same at the same%! |
| A. | Pressure and temperature |
| B. | Reduced pressure and reduced temperature |
| C. | Critical pressure and critical temperature |
| D. | None of these |
| Answer» C. Critical pressure and critical temperature | |
| 25. |
Number of phases in a colloidal system are%! |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 26. |
Adiabatic compression of a saturated water vapour makes it%! |
| A. | Supersaturated |
| B. | Superheated |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» C. Both A and B | |
| 27. |
There is a change in __________ during the phase transition.%! |
| A. | Volume |
| B. | Pressure |
| C. | Temperature |
| D. | All of the above |
| Answer» B. Pressure | |
| 28. |
At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by(where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)%! |
| A. | μ° + RT ln f |
| B. | μ°+ R lnf |
| C. | μ° + T lnf |
| D. | μ° + R/T lnf |
| Answer» B. ≈í¬∫¬¨‚àû+ R lnf | |
| 29. |
The work done in isothermal compression compared to that in adiabatic compression will be%! |
| A. | Less |
| B. | More |
| C. | Same |
| D. | More or less depending upon the extent of work done |
| Answer» C. Same | |
| 30. |
A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount". This is%! |
| A. | The distribution law |
| B. | Followed from Margule's equation |
| C. | A corollary of Henry's law |
| D. | None of these |
| Answer» B. Followed from Margule's equation | |
| 31. |
If we increase the pressure on a substance (which is at its triple point), then the triple point%! |
| A. | Increases |
| B. | Decreases |
| C. | Remains unchanged |
| D. | May increase or decrease ; depends on the substance |
| Answer» D. May increase or decrease ; depends on the substance | |
| 32. |
Van Laar equation deals with the activity co-efficients in%! |
| A. | Binary solutions |
| B. | Ternary solutions |
| C. | Azeotropic mixture only |
| D. | None of these |
| Answer» B. Ternary solutions | |
| 33. |
First law of thermodynamics deals with the%! |
| A. | Direction of energy transfer |
| B. | Reversible processes only |
| C. | Irreversible processes only |
| D. | None of these |
| Answer» B. Reversible processes only | |
| 34. |
Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?%! |
| A. | Air cycle |
| B. | Carnot cycle |
| C. | Ordinary vapour compression cycle |
| D. | Vapour compression with a reversible expansion engine |
| Answer» B. Carnot cycle | |
| 35. |
The standard state of a gas (at a given temperature) is the state in which fugacity is equal to%! |
| A. | Unity |
| B. | Activity |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 36. |
In the reaction, C + O₂ → CO₂ ; ΔH = - 94 kcal. What is the heat content (enthalpy)of O₂?%! |
| A. | -94 kcal |
| B. | > -94 kcal |
| C. | < - 94 kcal |
| D. | Zero |
| Answer» E. | |
| 37. |
__________ functions are exemplified by heat and work.%! |
| A. | Path |
| B. | Point |
| C. | State |
| D. | None of these |
| Answer» B. Point | |
| 38. |
At the critical point of a substance%! |
| A. | The surface tension vanishes |
| B. | Liquid and vapour have the same density |
| C. | There is no distinction between liquid and vapour phases |
| D. | All of the above |
| Answer» E. | |
| 39. |
Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants)%! |
| A. | (atm)Δx, when Δx is negative |
| B. | (atm)Δx, when Δx is positive |
| C. | Dimensionless, when Δx = 0 |
| D. | (atm)Δx2, when Δx > 0 |
| Answer» E. | |
| 40. |
A gas performs the maximum work, when it expands%! |
| A. | Non-uniformly |
| B. | Adiabatically |
| C. | Isobarically |
| D. | Isothermally |
| Answer» D. Isothermally | |
| 41. |
As the temperature is lowered towards the absolute zero, the value of the quantity (‚à ÇŒîF/‚à ÇT) approaches%! |
| A. | Zero |
| B. | Unity |
| C. | Infinity |
| D. | None of these |
| Answer» B. Unity | |
| 42. |
Reduced pressure of a gas is the ratio of its%! |
| A. | Pressure to critical pressure |
| B. | Critical pressure to pressure |
| C. | Pressure to pseudocritical pressure |
| D. | Pseudocritical pressure to pressure |
| Answer» B. Critical pressure to pressure | |
| 43. |
Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be%! |
| A. | Same |
| B. | Doubled |
| C. | Halved |
| D. | One fourth of its original value |
| Answer» B. Doubled | |
| 44. |
Which of the following is a thermodynamic property of a system?%! |
| A. | Concentration |
| B. | Mass |
| C. | Temperature |
| D. | Entropy |
| Answer» E. | |
| 45. |
An ideal liquid refrigerant should%! |
| A. | Not have a subatmospheric vapour pressure at the temperature in the refrigerator coils |
| B. | Not have unduly high vapour pressure at the condenser temperature |
| C. | Both A and B |
| D. | Have low specific heat |
| Answer» D. Have low specific heat | |
| 46. |
Cv for an ideal gas%! |
| A. | Does not depend upon temperature |
| B. | Is independent of pressure only |
| C. | Is independent of volume only |
| D. | Is independent of both pressure and volume |
| Answer» E. | |
| 47. |
The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.%! |
| A. | Temperature |
| B. | Pressure |
| C. | Composition |
| D. | All of the above |
| Answer» E. | |
| 48. |
Heat of reaction is%! |
| A. | Dependent on pressure only |
| B. | Dependent on temperature only |
| C. | Dependent on both pressure and temperature |
| D. | Independent of temperature changes |
| Answer» D. Independent of temperature changes | |
| 49. |
Which law of the thermodynamics provids basis for measuring the thermodynamic property?%! |
| A. | First law |
| B. | Zeroth law |
| C. | Third law |
| D. | Second law |
| Answer» C. Third law | |
| 50. |
For the reversible exothermic reaction, N‚ÇÇ + 3H‚ÇÇ ‚áã 2NH‚ÇÉ, increase of pressure would%! |
| A. | Shift the equilibrium towards right |
| B. | Give higher yield of NH‚ÇÉ |
| C. | Both B and C |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |