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MCQOPTIONS
This section includes 361 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
What is the efficiency of the system, if the actual work output from the process is 15 J and work output for a reversible process is 20 J? |
| A. | 25% |
| B. | 50% |
| C. | 75% |
| D. | 100% |
| Answer» D. 100% | |
| 152. |
In the reaction 2C + O₂-> 2CO, if the heat liberated is 10 J, what is the heat of formation of CO? |
| A. | -5 J |
| B. | 5 J |
| C. | -10 J |
| D. | 10 J |
| Answer» B. 5 J | |
| 153. |
In the reaction 2N -> N₂, if the heat liberated is 6 J, what is the heat of formation of N₂? |
| A. | – 6 J |
| B. | 6 J |
| C. | 0 |
| D. | Cannot be determined |
| Answer» B. 6 J | |
| 154. |
The specific volume of a gas is 2 m³/Kg, at 12 Pa, H = 30 J/Kg and at 15 Pa, H = 45 J/Kg, what is the heat transferred to the system? |
| A. | 6 J/Kg |
| B. | 9 J/Kg |
| C. | 12 J/Kg |
| D. | 15 J/Kg |
| Answer» C. 12 J/Kg | |
| 155. |
5 Kg of water (CP = 1 J/Kg°C) is pumped to a height of 0.5 m, work done by the motor is 50 J/Kg, and heat liberated by it is 5 J/Kg, what is the final temperature of water if the initial temperature was 0°C? |
| A. | 2°C |
| B. | 4°C |
| C. | 6°C |
| D. | 8°C |
| Answer» D. 8°C | |
| 156. |
In an open, steady state adiabatic process if the change in kinetic energy is 10 J and change in potential energy is 15 J, what is the work done by the system? |
| A. | 10 J |
| B. | 15 J |
| C. | 25 J |
| D. | -25 J |
| Answer» E. | |
| 157. |
What is the fundamental of the flow sheeting codes? |
| A. | Calculation of mass balance |
| B. | Calculation of momentum balance |
| C. | Calculation of force balance |
| D. | All of the mentioned |
| Answer» B. Calculation of momentum balance | |
| 158. |
Degrees of freedom calculation treat which kind of variables? |
| A. | Intensive |
| B. | Extensive |
| C. | Both |
| D. | None of the mentioned |
| Answer» B. Extensive | |
| 159. |
Cyclohexane having CP = 48 J/°C, is heated from 50°C to 55°C, what is the enthalpy change? |
| A. | 240 J |
| B. | 480 J |
| C. | 720 J |
| D. | 960 J |
| Answer» B. 480 J | |
| 160. |
Bernoulli equation is valid for which process? |
| A. | Reversible |
| B. | Irreversible |
| C. | None of them |
| D. | Both of them |
| Answer» B. Irreversible | |
| 161. |
What is the heat evolved when a gaseous solute is mixed with liquid solvent? |
| A. | Heat of solution |
| B. | Heat of mixing |
| C. | Heat of dissolution |
| D. | All of the mentioned |
| Answer» B. Heat of mixing | |
| 162. |
What is the heat of reaction if enthalpy of inputs and outputs at 25°C are 5 J and 8 J, the enthalpy of input and outputs at given temperature are 12 J and 15 J, enthalpy change of reaction is 25 J? |
| A. | 20 J |
| B. | 25 J |
| C. | 30 J |
| D. | 35 J |
| Answer» C. 30 J | |
| 163. |
If the system is insulated which of the following might the process be? |
| A. | Isothermal |
| B. | Isobaric |
| C. | Isochoric |
| D. | Adiabatic |
| Answer» E. | |
| 164. |
What is the heat of reaction if enthalpy of inputs and outputs at 25°C are 10 J and 20 J, the enthalpy of input and outputs at given temperature are 25 J and 30 J, enthalpy change of reaction is 50 J? |
| A. | 45 J |
| B. | 50 J |
| C. | 55 J |
| D. | 60 J |
| Answer» D. 60 J | |
| 165. |
What is the heat of reaction for CH₄ + 2O₂ -> CO₂ + 2H₂O, if the heat of combustion of H₂O = 5 J, CO₂ = 10 J, O₂ = 0, and CH₄ = 25 J? |
| A. | -5 J |
| B. | 5 J |
| C. | -10 J |
| D. | 10 J |
| Answer» C. -10 J | |
| 166. |
In a reaction the feed is 10 moles of 0.1 glucose and 0.9 water, and another feed of 5 moles of 0.4 glucose and 0.6 water, what is the fraction of glucose in the products? |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» B. 0.4 | |
| 167. |
What is the heat of reaction for C₂H₄ + 3O₂ -> 2CO₂ + 2H₂O, if heat of formation of C₂H₄, O₂, CO₂, and H₂O are 10 J, 5 J, 6 J and 2 J respectively? |
| A. | -4 J |
| B. | -2 J |
| C. | 0 |
| D. | 4 J |
| Answer» B. -2 J | |
| 168. |
If Cp of liquid benzene is 15 J/°C, what is the enthalpy change of water from 5°C to 10°C? |
| A. | 15 J |
| B. | 50 J |
| C. | 75 J |
| D. | 90 J |
| Answer» D. 90 J | |
| 169. |
What is the humid heat of a mixture of air (CP = 20 J) with water vapor (CP = 30 J), if the humidity is 40%? |
| A. | 24 J |
| B. | 32 J |
| C. | 38 J |
| D. | 44 J |
| Answer» C. 38 J | |
| 170. |
A mixture contains 20% SO₂ with CP= 35 J/°C, 30% NO₃ with CP = 20 J/°C and 50% CO₂ with CP = 40 J/°C, what is the average CP of mixture? |
| A. | 12 J/°C |
| B. | 17 J/°C |
| C. | 25 J/°C |
| D. | 33 J/°C |
| Answer» E. | |
| 171. |
What is the heat transferred to the system, if change in internal energy is 10 J? |
| A. | 0 |
| B. | -10 J |
| C. | 10 J |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 172. |
For exothermic reactions, what is the heat of reaction? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | Cannot Say |
| Answer» C. Zero | |
| 173. |
Mechanical energy satisfy which of the following? |
| A. | Completely Convertible |
| B. | Non-convertible |
| C. | Partially convertible |
| D. | None of the mentioned |
| Answer» B. Non-convertible | |
| 174. |
The humidity at dry-bulb temperature of 20°C is 30% and the humidity at dry-bulb temperature of 22°C is 24%, what is the slope of adiabatic cooling line? |
| A. | -0.01 |
| B. | -0.02 |
| C. | -0.03 |
| D. | -0.05 |
| Answer» D. -0.05 | |
| 175. |
Free expansion of gas against piston having friction is example of which process? |
| A. | Reversible |
| B. | Irreversible |
| C. | Cannot say |
| D. | None of the mentioned |
| Answer» C. Cannot say | |
| 176. |
In an open system, what is the enthalpy change is heat taken from it is 10 J? |
| A. | 0 |
| B. | -10 J |
| C. | 10 J |
| D. | Cannot be determined |
| Answer» C. 10 J | |
| 177. |
In a reactor two stream are entering, one with C₆H₆ at 10 atm and 27°C, and another with H₂ at 10 atm and 0°C, producing C₆H₁₂ and H₂ at 10 atm and 23°C, what are the total degrees of freedom? |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 23 |
| Answer» C. 20 | |
| 178. |
What is the enthalpy of reaction forC₆H₆ -> 3C₂H₂, if the conversion of C₆H₆ is 80%, and heat of formation of C₆H₆, and C₂H₂ are 24 J, and 8 J? |
| A. | 0 |
| B. | 2.4 J |
| C. | 4.8 J |
| D. | 5.6 J |
| Answer» D. 5.6 J | |
| 179. |
Which of the following a reversible process will involve? |
| A. | Dissipative effects |
| B. | Friction |
| C. | Equilibrium transfer of energy |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 180. |
Heat Capacity of water is given by 4 + T², what is the enthalpy change from 0°C to 3°C? |
| A. | 7 J |
| B. | 14 J |
| C. | 21 J |
| D. | 32 J |
| Answer» D. 32 J | |
| 181. |
For an ideal gas Isochoric process what is the work done by the gas from 2 Pa to 1 Pa? |
| A. | 0 |
| B. | 1 J |
| C. | 200 J |
| D. | None of the mentioned |
| Answer» B. 1 J | |
| 182. |
In a reactor two stream are entering, one with C₆H₆ at 10 atm and 27°C, and another with H₂ at 10 atm and 0°C, producing C₆H₆, C₆H₁₂, and H₂ at 10 atm and 23°C, what are the total degrees of freedom? |
| A. | 10 |
| B. | 12 |
| C. | 15 |
| D. | 16 |
| Answer» E. | |
| 183. |
A mixture contains 20% of A with Heat Capacity 25 J/°C, 30% of B with Heat Capacity 20 J/°C, and 50% of C with Heat Capacity 10 J/°C, what is the Heat Capacity of mixture? |
| A. | 10 J/°C |
| B. | 14 J/°C |
| C. | 16 J/°C |
| D. | 20 J/°C |
| Answer» D. 20 J/°C | |
| 184. |
What is the heat transferred from 2 mole of the system if the output sensible heat is 3 J/mole, input sensible heat is 2 J/mole, and heat of solution is 2 J/mole? |
| A. | 2 J |
| B. | 3 J |
| C. | 5 J |
| D. | 6 J |
| Answer» E. | |
| 185. |
What is the enthalpy change of 15°C system if the heat capacity of air at 20°C is 10 J/°C and heat capacity of water vapor at 20°C is 20 J/°C, enthalpy of vaporization is 20 J, and the humidity is 50%? |
| A. | 50 J |
| B. | 60 J |
| C. | 80 J |
| D. | 110 J |
| Answer» E. | |
| 186. |
What is the enthalpy change of the mixture if the enthalpy change of air is 10 J, enthalpy change of water vapor is 15 J, and the humidity is 40%? |
| A. | 10 J |
| B. | 12 J |
| C. | 14 J |
| D. | 16 J |
| Answer» E. | |
| 187. |
What is the heat transferred from the system if the output sensible heat is 5 J, input sensible heat is 25 J, and heat of solution is 20 J? |
| A. | 0 |
| B. | 5 J |
| C. | 10 J |
| D. | 15 J |
| Answer» B. 5 J | |
| 188. |
What is the latent heat for melting? |
| A. | Heat of vaporization |
| B. | Heat of fusion |
| C. | Heat of Solidification |
| D. | None of the mentioned |
| Answer» C. Heat of Solidification | |
| 189. |
What is the work done for an Isochoric process? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | Cannot say |
| Answer» D. Cannot say | |
| 190. |
What is the final enthalpy of the solution made by mixing 10 grams of solution A having enthalpy 10 J with 40 grams of solution B having enthalpy 30 J? |
| A. | 14 J |
| B. | 18 J |
| C. | 22 J |
| D. | 26 J |
| Answer» E. | |
| 191. |
What is the efficiency of the system, if the actual work input from the process is 10 J and work input for a reversible process is 20 J? |
| A. | 20% |
| B. | 50% |
| C. | 100% |
| D. | 200% |
| Answer» E. | |
| 192. |
If Cp of water is (23 + T) J/°C, what is the enthalpy change of water from 3°C to 5°C? |
| A. | 54 J |
| B. | 96 J |
| C. | 140 J |
| D. | 196 J |
| Answer» B. 96 J | |
| 193. |
Cp of ice is 10 J/°C and that of water is 15 J/°C, what is the enthalpy change of water from – 15°C to 0°C at standard conditions, if the later heat of fusion of water is 110 J? |
| A. | 150 J |
| B. | 315 J |
| C. | 485 J |
| D. | 560 J |
| Answer» D. 560 J | |
| 194. |
What is the reversible work done if 4 m³ of an ideal gas is compressed adiabatically pV1.5 = K from 2 Pa to 16 Pa? |
| A. | 4 J |
| B. | 16 J |
| C. | 24 J |
| D. | 56 J |
| Answer» C. 24 J | |
| 195. |
What is the heat transferred to the system if the enthalpy of the output is 15 J and input is 10 J? |
| A. | 1 J |
| B. | 2 J |
| C. | 4 J |
| D. | 5 J |
| Answer» E. | |
| 196. |
Humidity chart relates which of the following balances? |
| A. | Momentum and energy balance |
| B. | Material and energy balance |
| C. | Material and momentum balance |
| D. | None of the mentioned |
| Answer» C. Material and momentum balance | |
| 197. |
What is the heat of reaction for H₂ + Cl₂ -> 2HCl, if the heat of combustion of H₂ = 2 J, Cl₂ = 10 J, and HCl = 10 J? |
| A. | -8 J |
| B. | 8 J |
| C. | -10 J |
| D. | 10 J |
| Answer» B. 8 J | |
| 198. |
Theoretical flame temperature is defined for which process? |
| A. | Isothermal |
| B. | Adiabatic |
| C. | Isobaric |
| D. | Isochoric |
| Answer» C. Isobaric | |
| 199. |
What is the specific humidity, if pressure of water is 5 atm and total pressure is 10 atm? |
| A. | 25% |
| B. | 50% |
| C. | 75% |
| D. | 100% |
| Answer» E. | |
| 200. |
What is the humid volume of the system at 200°F with humidity 40%? |
| A. | 14.2 ft3/lb |
| B. | 23.4 ft3/lb |
| C. | 29.5 ft3/lb |
| D. | 31.6 ft3/lb |
| Answer» E. | |