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.
| 351. |
Boyle's law for gases states that$? |
| A. | P ‚Äö√ √π 1/V, when temperature is constant |
| B. | P ‚Äö√ √π 1/V, when temperature & mass of the gas remain constant |
| C. | P ‚Äö√ √π V, at constant temperature & mass of the gas |
| D. | P/V = constant, for any gas |
| Answer» C. P ‚Äö√ √π V, at constant temperature & mass of the gas | |
| 352. |
Which of the following is not an extensive property?$? |
| A. | Free energy |
| B. | Entropy |
| C. | Refractive index |
| D. | None of these |
| Answer» D. None of these | |
| 353. |
Which of the following is not an intensive property?$? |
| A. | Chemical potential |
| B. | Surface tension |
| C. | Heat capacity |
| D. | None of these |
| Answer» D. None of these | |
| 354. |
The change in Gibbs freee energy for vaporisation of a pure substance is$? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | May be positive or negative |
| Answer» D. May be positive or negative | |
| 355. |
Compound having large heat of formation is$? |
| A. | More stable |
| B. | Less stable |
| C. | Not at all stable (like nascent O‚ÇÇ) |
| D. | Either more or less stable ; depends on the compound |
| Answer» B. Less stable | |
| 356. |
The standard Gibbs free energy change of a reaction depends on the equilibrium$? |
| A. | Pressure |
| B. | Temperature |
| C. | Composition |
| D. | All of the above |
| Answer» C. Composition | |
| 357. |
Joule-Thomson experiment is$? |
| A. | Isobaric |
| B. | Adiabatic |
| C. | Isenthalpic |
| D. | Both B & C |
| Answer» E. | |
| 358. |
As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches$? |
| A. | Zero |
| B. | Unity |
| C. | Infinity |
| D. | An indeterminate value |
| Answer» C. Infinity | |
| 359. |
If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as$? |
| A. | Solubility increases as temperature increases |
| B. | Solubility increases as temperature decreases |
| C. | Solubility is independent of temperature |
| D. | Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution |
| Answer» C. Solubility is independent of temperature | |
| 360. |
In an ideal solution, the activity of a component equals its$? |
| A. | Mole fraction |
| B. | Fugacity at the same temperature and pressure |
| C. | Partial pressure |
| D. | None of these |
| Answer» B. Fugacity at the same temperature and pressure | |
| 361. |
Which is not a refrigerant?$? |
| A. | SO‚ÇÇ |
| B. | NH‚ÇÉ |
| C. | CCl‚ÇÇF‚ÇÇ |
| D. | C‚ÇÇH‚ÇÑCl‚ÇÇ |
| Answer» E. | |
| 362. |
Clayperon equation deals with the$? |
| A. | Rate of change of vapour pressure with temperature |
| B. | Effect of an inert gas on vapour pressure |
| C. | Calculation of ΔF for spontaneous phase change |
| D. | Temperature dependence of heat of phase transition |
| Answer» B. Effect of an inert gas on vapour pressure | |
| 363. |
The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.$? |
| A. | Contracts |
| B. | Expands |
| C. | Does not change in volume |
| D. | Either A, B or C |
| Answer» B. Expands | |
| 364. |
The most important application of distribution law is in$? |
| A. | Evaporation |
| B. | Liquid extraction |
| C. | Drying |
| D. | Distillation |
| Answer» C. Drying | |
| 365. |
A system is said to be isopiestic, if there is no __________ change.$? |
| A. | Temperature |
| B. | Pressure |
| C. | Volume |
| D. | None of these |
| Answer» C. Volume | |
| 366. |
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg . K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is$? |
| A. | Superheated vapour |
| B. | Partially condensed vapour with quality of 0.9 |
| C. | Saturated vapour |
| D. | Partially condensed vapour with quality of 0.1 |
| Answer» B. Partially condensed vapour with quality of 0.9 | |
| 367. |
Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will$? |
| A. | Increase |
| B. | Decrease |
| C. | Remain unchanged |
| D. | First fall and then rise |
| Answer» B. Decrease | |
| 368. |
The absolute entropy for all crystalline substances at absolute zero temperature is$? |
| A. | Zero |
| B. | Negative |
| C. | More than zero |
| D. | Indeterminate |
| Answer» B. Negative | |
| 369. |
A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system are$? |
| A. | 4 |
| B. | 3 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 370. |
Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which$? |
| A. | A homogeneous solution (say of phenol water) is formed |
| B. | Mutual solubility of the two liquids shows a decreasing trend |
| C. | Two liquids are completely separated into two layers |
| D. | None of these |
| Answer» B. Mutual solubility of the two liquids shows a decreasing trend | |
| 371. |
Second law of thermodynamics is concerned with the$? |
| A. | Amount of energy transferred |
| B. | Direction of energy transfer |
| C. | Irreversible processes only |
| D. | Non-cyclic processes only |
| Answer» C. Irreversible processes only | |
| 372. |
Dry ice is$? |
| A. | Moisture free ice |
| B. | Solid helium |
| C. | Solid carbon dioxide |
| D. | None of these |
| Answer» D. None of these | |
| 373. |
In the reaction, represented by, 2SO₂ + O₂ ⇋ 2SO₃; ΔH = - 42 kcal; the forward reaction will be favoured by$? |
| A. | Low temperature |
| B. | High pressure |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 374. |
Any substance above its critical temperature exists as$? |
| A. | Saturated vapour |
| B. | Solid |
| C. | Gas |
| D. | Liquid |
| Answer» D. Liquid | |
| 375. |
(‚à ÇH/‚à ÇT)p is the mathematical expression for$? |
| A. | CV |
| B. | Entropy change |
| C. | Gibbs free energy |
| D. | None of these |
| Answer» E. | |
| 376. |
For a real gas, the chemical potential is given by$? |
| A. | RT dlnP |
| B. | RT dlnf |
| C. | R dlnf |
| D. | None of these |
| Answer» C. R dlnf | |
| 377. |
Joule-Thomson co-efficient for a perfect gas is$? |
| A. | Zero |
| B. | Positive |
| C. | Negative |
| D. | None of these |
| Answer» B. Positive | |
| 378. |
In the decomposition of PCl5 represented by, PCl5 ‚áã PCl3 + Cl‚ÇÇ, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.$? |
| A. | Increase |
| B. | Decrease |
| C. | Not alter |
| D. | None of these |
| Answer» B. Decrease | |
| 379. |
All gases during throttling process at atmospheric temperature and pressure show a cooling effect except$? |
| A. | CO‚ÇÇ |
| B. | H‚ÇÇ |
| C. | O‚ÇÇ |
| D. | N‚ÇÇ |
| Answer» C. O‚Äö√á√á | |
| 380. |
Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are$? |
| A. | Always greater than one |
| B. | Same at the same reduced temperature |
| C. | Same at the same reduced pressure |
| D. | Both B & C |
| Answer» E. | |
| 381. |
Forward reaction will be favoured for the exothermic reaction, represented by CO + H‚ÇÇO ‚áã CO‚ÇÇ + H‚ÇÇ, by$? |
| A. | Low temperature and high pressure |
| B. | Low temperature and low pressure |
| C. | High temperature and high pressure |
| D. | High temperature and low pressure |
| Answer» B. Low temperature and low pressure | |
| 382. |
The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.$? |
| A. | Lowest |
| B. | Highest |
| C. | Average |
| D. | None of these |
| Answer» B. Highest | |
| 383. |
Helmholtz free energy (A) is defined as$? |
| A. | A = H - TS |
| B. | A = E - TS |
| C. | A = H + TS |
| D. | None of these |
| Answer» C. A = H + TS | |
| 384. |
The shape of T-S diagram for Carnot Cycle is a$? |
| A. | Rectangle |
| B. | Rhombus |
| C. | Trapezoid |
| D. | Circle |
| Answer» B. Rhombus | |
| 385. |
Which of the following is not a common refrigerant?$? |
| A. | Freon-12 |
| B. | Ethylene |
| C. | Ammonia |
| D. | Carbon dioxide |
| Answer» C. Ammonia | |
| 386. |
Which of the following processes can not be made reversible even under ideal condition of operation?$? |
| A. | Free expansion of a gas |
| B. | Compression of air in a compressor |
| C. | Expansion of steam in a turbine |
| D. | All of the above |
| Answer» B. Compression of air in a compressor | |
| 387. |
Which of the following has the minimum value of COP for a given refrigeration effect?$? |
| A. | Reverse Carnot cycle |
| B. | Ordinary vapour-compression cycle |
| C. | Vapour-compression process with a reversible expansion engine |
| D. | Air refrigeration cycle |
| Answer» E. | |
| 388. |
For organic compounds, group contribution method can be used for the estimation of$? |
| A. | Critical properties |
| B. | Specific gravity |
| C. | Specific volume |
| D. | Thermal conductivity |
| Answer» B. Specific gravity | |
| 389. |
Which of the following is affected by the temperature?$? |
| A. | Fugacity |
| B. | Activity co-efficient |
| C. | Free energy |
| D. | All of the above |
| Answer» E. | |
| 390. |
A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system$? |
| A. | Its internal energy (U) decreases and its entropy (S) increases |
| B. | U and S both decreases |
| C. | U decreases but S is constant |
| D. | U is constant but S decreases |
| Answer» C. U decreases but S is constant | |
| 391. |
If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as? |
| A. | Solubility increases as temperature increases |
| B. | Solubility increases as temperature decreases |
| C. | Solubility is independent of temperature |
| D. | Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution |
| Answer» C. Solubility is independent of temperature | |
| 392. |
In an ideal solution, the activity of a component equals its? |
| A. | Mole fraction |
| B. | Fugacity at the same temperature and pressure |
| C. | Partial pressure |
| D. | None of these |
| Answer» B. Fugacity at the same temperature and pressure | |
| 393. |
Which is not a refrigerant?? |
| A. | SO‚ÇÇ |
| B. | NH‚ÇÉ |
| C. | CCl‚ÇÇF‚ÇÇ |
| D. | C‚ÇÇH‚ÇÑCl‚ÇÇ |
| Answer» E. | |
| 394. |
Clayperon equation deals with the? |
| A. | Rate of change of vapour pressure with temperature |
| B. | Effect of an inert gas on vapour pressure |
| C. | Calculation of ΔF for spontaneous phase change |
| D. | Temperature dependence of heat of phase transition |
| Answer» B. Effect of an inert gas on vapour pressure | |
| 395. |
The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.? |
| A. | Contracts |
| B. | Expands |
| C. | Does not change in volume |
| D. | Either A, B or C |
| Answer» B. Expands | |
| 396. |
As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches? |
| A. | Zero |
| B. | Unity |
| C. | Infinity |
| D. | An indeterminate value |
| Answer» C. Infinity | |
| 397. |
All gases during throttling process at atmospheric temperature and pressure show a cooling effect except? |
| A. | CO‚ÇÇ |
| B. | H‚ÇÇ |
| C. | O‚ÇÇ |
| D. | N‚ÇÇ |
| Answer» C. O‚Äö√á√á | |
| 398. |
Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are? |
| A. | Always greater than one |
| B. | Same at the same reduced temperature |
| C. | Same at the same reduced pressure |
| D. | Both B & C |
| Answer» E. | |
| 399. |
Forward reaction will be favoured for the exothermic reaction, represented by CO + H‚ÇÇO ‚áã CO‚ÇÇ + H‚ÇÇ, by? |
| A. | Low temperature and high pressure |
| B. | Low temperature and low pressure |
| C. | High temperature and high pressure |
| D. | High temperature and low pressure |
| Answer» B. Low temperature and low pressure | |
| 400. |
Joule-Thomson co-efficient for a perfect gas is? |
| A. | Zero |
| B. | Positive |
| C. | Negative |
| D. | None of these |
| Answer» B. Positive | |