MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 332 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. |
Normality of a solution does not change with the increase in the __________________? |
| A. | Pressure |
| B. | Temperature |
| C. | Solute concentration |
| D. | Dilution of the solution |
| Answer» B. Temperature | |
| 152. |
No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________? |
| A. | Collide without loss of energy |
| B. | Do work equal to loss in kinetic energy |
| C. | Are above the inversion temperature |
| D. | Exert no attractive force on each other |
| Answer» D. Exert no attractive force on each other | |
| 153. |
Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________________? |
| A. | 20 |
| B. | 32.2 |
| C. | 45.35 |
| D. | 58.65 |
| Answer» E. | |
| 154. |
N2 content in a urea sample was found to be only 42%. What is the actual urea content of the sample? (Molecular weight of urea = 60) ? |
| A. | 80% |
| B. | 90% |
| C. | 95% |
| D. | 98% |
| Answer» C. 95% | |
| 155. |
Molar heat capacity of water in equilibrium with ice at constant pressure is_____________________? |
| A. | 0 |
| B. | ∞ |
| C. | 1 |
| D. | None of these |
| Answer» C. 1 | |
| 156. |
Molality is defined as the number of gm moles of solute per _____________ of solvent? |
| A. | Litre |
| B. | kg |
| C. | gm.mole |
| D. | gm |
| Answer» C. gm.mole | |
| 157. |
Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is_______________? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 158. |
Measurement of the amount of dry gas collected over water from volume of moist gas is based on the___________________? |
| A. | Charle’s law |
| B. | Dalton’s law of partial pressures |
| C. | Avogadro’s hypothesis |
| D. | Boyle’s law |
| Answer» C. Avogadro’s hypothesis | |
| 159. |
Maximum alumina content in high alumina refractory can be as high as ____________ percent? |
| A. | 30 |
| B. | 50 |
| C. | 70 |
| D. | 90 |
| Answer» E. | |
| 160. |
Mass number of an atom is the sum of the numbers of_________________? |
| A. | Neutrons and protons |
| B. | Protons and electrons |
| C. | Neutrons and electrons |
| D. | Both A. & B. |
| Answer» E. | |
| 161. |
Magnesite refractories are used for the construction of those furnaces, which are_______________? |
| A. | Not required to resist the corrosive action of basic slag |
| B. | Not subjected to fluctuation in temperature |
| C. | Used for raising & maintaining high temperature |
| D. | Both B. and C. |
| Answer» E. | |
| 162. |
Magnesite refractories are generally not used in the__________________? |
| A. | Electric furnace walls |
| B. | Steel melting furnace |
| C. | Open hearth furnace |
| D. | Burning zone of cement kilns |
| Answer» C. Open hearth furnace | |
| 163. |
Lower wall courses of soaking pits are made of _____________ bricks to avoid the action of molten slag & scale? |
| A. | Chrome or magnesite |
| B. | Silicon carbide |
| C. | Silica |
| D. | Low duty fireclay |
| Answer» B. Silicon carbide | |
| 164. |
Kopp’s rule is useful for the determination of_____________________? |
| A. | Molal heat capacities of gases |
| B. | Heat capacities of solids |
| C. | Activation energy |
| D. | Heat capacities of gases |
| Answer» C. Activation energy | |
| 165. |
Kopp’s rule is helpful in finding the__________________? |
| A. | Heat capacities of solids |
| B. | Heat capacities of gases |
| C. | Molal heat capacities of gases |
| D. | Activation energy |
| Answer» B. Heat capacities of gases | |
| 166. |
Kopp’s rule is concerned with the calculation of__________________? |
| A. | Thermal conductivity |
| B. | Heat capacity |
| C. | Viscosity |
| D. | Surface tension |
| Answer» C. Viscosity | |
| 167. |
Kinetic theory of gases stipulates that, the____________________? |
| A. | Energy is lost during molecular collisions |
| B. | Molecules possess appreciable volume |
| C. | Absolute temperature is a measure of the kinetic energy of molecules |
| D. | None of these |
| Answer» D. None of these | |
| 168. |
Kinematic viscosity of 1 m2 /second is equivalent to _____________ stokes? |
| A. | 10 |
| B. | 102 |
| C. | 103 |
| D. | 104 |
| Answer» E. | |
| 169. |
_____________ kg of CaC03 on heating will give 56 kg of CaO? |
| A. | 56 |
| B. | 100 |
| C. | 144 |
| D. | 1000 |
| Answer» C. 144 | |
| 170. |
Isotopes are atoms having the same _____________________? |
| A. | Mass number |
| B. | Number of neutrons |
| C. | Atomic mass |
| D. | None of these |
| Answer» E. | |
| 171. |
Isotonic solutions must have the same__________________? |
| A. | Viscosity |
| B. | Molar concentration |
| C. | Normality |
| D. | Critical temperature |
| Answer» C. Normality | |
| 172. |
Internal energy of a substance comprises of the _____________ energy? |
| A. | Vibrational |
| B. | Rotational |
| C. | Translational |
| D. | All A., B. & C. |
| Answer» E. | |
| 173. |
Internal energy is independent of the ____________ for an ideal gas? |
| A. | Pressure |
| B. | Volume |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 174. |
Increasing the temperature of an aqueous solution will cause decrease in its________________? |
| A. | Molality |
| B. | Mole fraction |
| C. | Weight percent |
| D. | Molarity |
| Answer» E. | |
| 175. |
In the reaction, represented by Na2CO3 + HC1 → NaHO3 + NaCl, the equivalent weight of Na2CO3 is________________? |
| A. | 53 |
| B. | 5.3 |
| C. | 106 |
| D. | 10.6 |
| Answer» D. 10.6 | |
| 176. |
In the reaction, Ca + 2H2O = Ca(OH)2 + H2; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water ? (Atomic weight of calcium = 40) ? |
| A. | 4480 |
| B. | 2240 |
| C. | 1120 |
| D. | 0.4 |
| Answer» B. 2240 | |
| 177. |
In _______________ process, ions of salts react with water to produce acidity or alkalinity ? |
| A. | Hydration |
| B. | Hydrolysis |
| C. | Electrolysis |
| D. | Dialysis |
| Answer» C. Electrolysis | |
| 178. |
In physical adsorption, as compared to chemisorption, the________________________? |
| A. | Quantity adsorbed per unit mass is higher |
| B. | Rate of adsorption is controlled by the resistance to surface reaction |
| C. | Activation energy is very high |
| D. | Heat of adsorption is very large |
| Answer» B. Rate of adsorption is controlled by the resistance to surface reaction | |
| 179. |
In panel test for spalling resistance, the average face temperature of panel assembly is maintained at _____________ °C for 24 hours? |
| A. | 700 |
| B. | 1000 |
| C. | 1600 |
| D. | 2000 |
| Answer» D. 2000 | |
| 180. |
In osmosis through a semi-permeable membrane, diffusion of the___________________? |
| A. | Solvent is from low concentration to high concentration region |
| B. | Solvent is from high concentration to low concentration region |
| C. | Solute takes place |
| D. | None of these |
| Answer» B. Solvent is from high concentration to low concentration region | |
| 181. |
In general, the specific heats of aqueous solutions _____________ with increase in the concentration of the solute? |
| A. | Increase |
| B. | Decrease |
| C. | Remain unchanged |
| D. | None of these |
| Answer» C. Remain unchanged | |
| 182. |
In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality ? |
| A. | Use of equation of state |
| B. | Fugacity co-efficient |
| C. | Activity co-efficient |
| D. | None of these |
| Answer» D. None of these | |
| 183. |
In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the________________? |
| A. | Total pressure |
| B. | Absolute humidity at a given temperature |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 184. |
In case of a ternary system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the______________? |
| A. | Solute concentration |
| B. | Temperature |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 185. |
In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is__________________? |
| A. | Independent of the temperature |
| B. | Increased with the increase in pressure |
| C. | Decreased with the increase in pressure |
| D. | Unchanged by the pressure change |
| Answer» D. Unchanged by the pressure change | |
| 186. |
In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is__________________? |
| A. | Independent of temperature |
| B. | Increases with rise in pressure |
| C. | Increased with decrease in pressure |
| D. | Unchanged with pressure changes |
| Answer» C. Increased with decrease in pressure | |
| 187. |
In a neutral solution _________________? |
| A. | H+ ions are absent |
| B. | OH- ions are absent |
| C. | Both H+ and OH- ions are present in very small but equal concentration |
| D. | None of these |
| Answer» D. None of these | |
| 188. |
In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is__________________? |
| A. | 180 |
| B. | 60.3 |
| C. | 720 |
| D. | 200 |
| Answer» C. 720 | |
| 189. |
In a chemical process, the recycle stream is purged for______________________? |
| A. | Increasing the product yield |
| B. | Enriching the product |
| C. | Limiting the inerts |
| D. | Heat conservation |
| Answer» D. Heat conservation | |
| 190. |
In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure? |
| A. | Kg of solute/kg of solvent |
| B. | Kg-mole of solute/kg-mole of solvent |
| C. | Kg-mole of solute/1000 kg of solvent |
| D. | All A., B. & C. |
| Answer» E. | |
| 191. |
In a binary liquid solution of components „A‟ and „B‟, if component „A‟ exhibits positive deviation from Raoult’s law, then component „B‟ ? |
| A. | Exhibits positive deviation from Raoult’s law |
| B. | Exhibits negative deviation from Raoult’s law |
| C. | Obeys Raoult’s law |
| D. | May exhibit either positive or negative deviation from Raoult’s law |
| Answer» B. Exhibits negative deviation from Raoult’s law | |
| 192. |
If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________? |
| A. | Be reduced to 1/4th |
| B. | Increase four times |
| C. | Increase two times |
| D. | None of these |
| Answer» D. None of these | |
| 193. |
If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________? |
| A. | Bubble point |
| B. | Saturation temperature |
| C. | Dew point |
| D. | Both B. and C. |
| Answer» E. | |
| 194. |
If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will _______________? |
| A. | Remain unaltered |
| B. | Increase nine fold |
| C. | Increase three fold |
| D. | Decrease three fold |
| Answer» C. Increase three fold | |
| 195. |
If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times? |
| A. | 10 |
| B. | 10 |
| C. | 1000 |
| D. | 10000 |
| Answer» D. 10000 | |
| 196. |
If pH value of a solution is 8, then its pOH value will be ____________________? |
| A. | 6 |
| B. | 1 |
| C. | 7 |
| D. | 10 |
| Answer» B. 1 | |
| 197. |
If a solution of eutectic composition is cooled, _______________ reaching the eutectic temperature ? |
| A. | The solvent begins to freeze out even before |
| B. | It will undergo no change until |
| C. | It will not solidify even on |
| D. | None of these |
| Answer» C. It will not solidify even on | |
| 198. |
If 1.5 moles of oxygen combines with aluminium to form Al2O3, then the weight of aluminium (atomic weight = 27) used in this reaction is __________ gm? |
| A. | 27 |
| B. | 54 |
| C. | 5.4 |
| D. | 2.7 |
| Answer» C. 5.4 | |
| 199. |
If 1 Nm3 of O2 contains ‘N’ number of molecules, then number of molecules in 2Nm3 of SO2 will be_________________? |
| A. | N |
| B. | N/2 |
| C. | 2N |
| D. | 4N |
| Answer» D. 4N | |
| 200. |
Hot metal runner in blast furnace are lined with ______________ bricks? |
| A. | Silica |
| B. | Carborundum |
| C. | Fireclay |
| D. | Magnesite |
| Answer» D. Magnesite | |