MCQOPTIONS
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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.
| 451. |
What happens in a reversible adiabatic expansion process? |
| A. | Heating takes place |
| B. | Cooling takes place |
| C. | Pressure is constant |
| D. | Temperature is constant |
| Answer» C. Pressure is constant | |
| 452. |
PVγ = Constant (where, γ = Cp/Cv) is valid for a/an __________ process.$ |
| A. | Isothermal |
| B. | Isentropic |
| C. | Isobaric |
| D. | Adiabatic |
| Answer» E. | |
| 453. |
Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ‚áã PCl3 + Cl‚ÇÇ.Degree of dissociation of PCl5 will$ |
| A. | Decrease on addition of Cl‚ÇÇ |
| B. | Increase on addition of an inert gas at constant pressure |
| C. | Decrease on increasing the pressure of the system |
| D. | None of these |
| Answer» E. | |
| 454. |
What happens in a reversible adiabatic compression? |
| A. | Heating occurs |
| B. | Cooling occurs |
| C. | Pressure is constant |
| D. | Temperature is constant |
| Answer» B. Cooling occurs | |
| 455. |
A gas has a volume of 27.3 c.c. at 0°C. Its volume at 10°C (if pressure remains unchanged) will be __________ c.c.# |
| A. | 2.73 |
| B. | 28.3 |
| C. | 273 |
| D. | 283 |
| Answer» C. 273 | |
| 456. |
The Joule-Thomson co-efficient is defined as (‚à ÇT/‚à ÇP)H. Its value at the inversion point is# |
| A. | ‚à û |
| B. | 1 |
| C. | 0 |
| D. | -ve |
| Answer» D. -ve | |
| 457. |
1m³ 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 |
| Answer» D. 154 K | |
| 458. |
What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor? |
| A. | 2 |
| B. | 0 |
| C. | 3 |
| D. | 1 |
| Answer» B. 0 | |
| 459. |
Sublimation temperature of dry ice (solid CO₂) is __________ °C.# |
| A. | -273 |
| B. | 0 |
| C. | -78 |
| D. | 5 |
| Answer» D. 5 | |
| 460. |
The value of Cp & Cv respectively for monoatomic gases in Kcal/kg Mole . °K are# |
| A. | 5 & 3 |
| B. | 3.987 & 1.987 |
| C. | 1.987 & 0.66 |
| D. | 0.66 & 1.987 |
| Answer» B. 3.987 & 1.987 | |
| 461. |
(‚à ÇE/‚à ÇT)V is the mathematical expression for# |
| A. | CV |
| B. | Enthalpy change |
| C. | Free energy change |
| D. | None of these |
| Answer» E. | |
| 462. |
If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) ⇋ C₃H₈ (g) will be __________ Kcal.# |
| A. | -19.4 |
| B. | -30.2 |
| C. | 55.2 |
| D. | -55.2 |
| Answer» B. -30.2 | |
| 463. |
What is the value of ln y (where y = activity co-efficient) for ideal gases? |
| A. | Zero |
| B. | Unity |
| C. | Infinity |
| D. | Negative |
| Answer» B. Unity | |
| 464. |
What is the ratio of adiabatic compressibility to isothermal compressibility? |
| A. | 1 |
| B. | < 1 |
| C. | > 1 |
| D. | >> 1 |
| Answer» C. > 1 | |
| 465. |
Consider the reaction, C + O₂ ⇋ CO₂ ;ΔH = - 94 kcal. What will be the value of ΔH for the reaction CO₂ → C + O₂?# |
| A. | -94 kcal |
| B. | + 94 kcal |
| C. | > 94 kcal |
| D. | < -94 kcal |
| Answer» C. > 94 kcal | |
| 466. |
At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.# |
| A. | 72 |
| B. | 92 |
| C. | 142 |
| D. | 192 |
| Answer» C. 142 | |
| 467. |
What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope? |
| A. | 3 |
| B. | 2 |
| C. | 1 |
| D. | 0 |
| Answer» D. 0 | |
| 468. |
In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v₁ = 1 m³ and v₂ 3 m³ ) is max imum, when the value of 'n' is# |
| A. | 0 |
| B. | 1 |
| C. | 1.44 |
| D. | 1.66 |
| Answer» B. 1 | |
| 469. |
1/V (‚à ÇV/‚à ÇT)p is the mathematical expression# |
| A. | Joule-Thomson co-efficient |
| B. | Specific heat at constant pressure (Cp) |
| C. | Co-efficient of thermal expansion |
| D. | Specific heat at constant volume (CV) |
| Answer» D. Specific heat at constant volume (CV) | |