MCQOPTIONS
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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.
| 201. |
High porosity refractory bricks have________________? |
| A. | Poor resistance to the penetration of molten slag, metal & flue gases |
| B. | Poor heat conductivity & low strength |
| C. | Better thermal spalling resistance |
| D. | All A., B. and C. |
| Answer» E. | |
| 202. |
Hess’s law of constant heat summation is based on conservation of mass. It deals with ___________________? |
| A. | Equilibrium constant |
| B. | Reaction rate |
| C. | Changes in heat of reaction |
| D. | None of these |
| Answer» D. None of these | |
| 203. |
Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________? |
| A. | Vapor to liquid |
| B. | Vapor to solid |
| C. | Solid to liquid |
| D. | One allotropic form to another allotropic form |
| Answer» E. | |
| 204. |
Heat of solution in a system in which both solute and solvent are liquids is termed as_________________? |
| A. | Heat of solvation |
| B. | Heat of hydration |
| C. | Standard integral heat of solution |
| D. | Heat of mixing |
| Answer» E. | |
| 205. |
Heat of ____________ of a fuel is called its calorific value? |
| A. | Formation |
| B. | Combustion |
| C. | Reaction |
| D. | Vaporisation |
| Answer» C. Reaction | |
| 206. |
Heat of reaction is not influenced by__________________? |
| A. | The route/method through which final products are obtained |
| B. | The physical state (e.g., solid, liquid or gaseous) of reactants and products |
| C. | Whether the reaction is carried out at constant temperature or constant pressure |
| D. | None of these |
| Answer» B. The physical state (e.g., solid, liquid or gaseous) of reactants and products | |
| 207. |
Heat of reaction is a function of the___________________? |
| A. | Pressure |
| B. | Temperature |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 208. |
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because_________________? |
| A. | The strong base and strong acid reacts completely |
| B. | The salt formed does not hydrolyse |
| C. | Only OH- and H+ ions react in every case |
| D. | The strong base and strong acid reacts in aqueous solution |
| Answer» D. The strong base and strong acid reacts in aqueous solution | |
| 209. |
Heat of neutralisation of HCl and NaOH is – 57.46 kJ/Kg mole. The heat of ionisation of water will be _____________ kJ/Kg mole? |
| A. | 57.46 |
| B. | -57.46 |
| C. | 114.92 |
| D. | -28.73 |
| Answer» B. -57.46 | |
| 210. |
Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10-3 T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to – 100°C is ____________________? |
| A. | 10.73 kJ |
| B. | 16.15 kJ |
| C. | 18.11 kJ |
| D. | 18.33 kJ |
| Answer» D. 18.33 kJ | |
| 211. |
‘Giga’ stands for__________________? |
| A. | 109 |
| B. | 10-12 |
| C. | 1012 |
| D. | 1015 |
| Answer» B. 10-12 | |
| 212. |
Gases having same reduced temperatures and reduced pressures_________________? |
| A. | Deviate from ideal gas behaviour to the same degree |
| B. | Have nearly the same compressibility factor |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 213. |
Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________? |
| A. | Are held together by stronger inter-molecular forces |
| B. | Move faster |
| C. | Have no definite shape |
| D. | Are heavier |
| Answer» B. Move faster | |
| 214. |
Fusion point of a basic refractory material is________________? |
| A. | Reduced by the addition of acid oxides |
| B. | Increased by the addition of acid oxides |
| C. | Not affected by the addition of acid oxides |
| D. | Always less than 1000°C |
| Answer» B. Increased by the addition of acid oxides | |
| 215. |
_____________ fuels require the maximum percentage of ‘excess air’ for complete combustion ? |
| A. | Solid |
| B. | Liquid |
| C. | Gaseous |
| D. | Nuclear |
| Answer» B. Liquid | |
| 216. |
For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ? |
| A. | Dry bulb temperature |
| B. | Wet bulb temperature |
| C. | Humidity |
| D. | Relative saturation |
| Answer» C. Humidity | |
| 217. |
For the gaseous phase reaction, N2 + O2 ⇌ 2NO, ΔH = + 80 kJ/kg. mole; the decomposition of NO is favoured by____________________? |
| A. | Increasing the concentration of N2 |
| B. | Decrease in temperature |
| C. | Increase in pressure |
| D. | Decrease in pressure |
| Answer» C. Increase in pressure | |
| 218. |
For most salts, the solubility increases with rise in temperature, but the solubility of _______________ is nearly independent of temperature rise? |
| A. | Sodium chloride |
| B. | Sodium carbonate monohydrate |
| C. | Anhydrous sodium sulphate |
| D. | Hypo |
| Answer» B. Sodium carbonate monohydrate | |
| 219. |
For estimation of heat capacity of a solid compound, one can use________________? |
| A. | Clapeyron’s equation |
| B. | Gibb’s equation |
| C. | Kopp’s rule |
| D. | Trouton’s rule |
| Answer» D. Trouton’s rule | |
| 220. |
For any system, the _____________ heat of solution is dependent on the temperature and the adsorbate concentration? |
| A. | Integral |
| B. | Differential |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 221. |
For an ideal solution, the total vapor pressure varies _____________ with the composition (expressed as mole fraction)? |
| A. | Inversely |
| B. | Exponentially |
| C. | Linearly |
| D. | Negligibly |
| Answer» D. Negligibly | |
| 222. |
For an ideal gas, the compressibility factor________________? |
| A. | Decreases with pressure rise |
| B. | Is unity at all temperature |
| C. | Is unity at Boyle’s temperature |
| D. | Zero |
| Answer» C. Is unity at Boyle’s temperature | |
| 223. |
For a reaction, X → Y, if the concentration of ‘X’ is tripled; the rate becomes nine times. The order of reaction is__________________? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 224. |
For a neutral solution (pH = 7), the value of [H+] [OH-] is equal to_________________? |
| A. | 0 |
| B. | 1 |
| C. | < 1 |
| D. | > 1 |
| Answer» C. < 1 | |
| 225. |
For a given mass of a gas at constant temperature, if the volume ‘V’ becomes three times, then the pressure ‘P’ will become______________? |
| A. | P/3 |
| B. | 3P |
| C. | 9P2 |
| D. | 9P |
| Answer» B. 3P | |
| 226. |
Fireclay refractories___________________? |
| A. | Are not resistant to the action of basic slags |
| B. | Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc |
| C. | Shrink during firing |
| D. | All A., B. and C. |
| Answer» E. | |
| 227. |
Fireclay bricks is not used for lining the_______________? |
| A. | Cupola |
| B. | Gas producer |
| C. | Bottom of hot metal mixer |
| D. | Roof of open hearth furnace |
| Answer» D. Roof of open hearth furnace | |
| 228. |
Fireclay bricks are used in the______________? |
| A. | Coke ovens regenerator |
| B. | Outer lining of L.D. converter |
| C. | Hearth bottom of blast furnace |
| D. | Coke oven walls |
| Answer» B. Outer lining of L.D. converter | |
| 229. |
Fireclay bricks are not used in the________________? |
| A. | Beehive coke oven |
| B. | By-product coke oven walls |
| C. | Combustion chamber of B.F. stoves |
| D. | Coke oven regenerators |
| Answer» C. Combustion chamber of B.F. stoves | |
| 230. |
Fireclay bricks are not used in the_________________? |
| A. | Blast furnace |
| B. | Hot blast stove |
| C. | Cupola |
| D. | Wall of coke oven |
| Answer» E. | |
| 231. |
Faster rate of drying of moulded refractories results in high ______________ of refractories? |
| A. | Green strength |
| B. | Voids |
| C. | Shrinkage |
| D. | Both B. and C. |
| Answer» E. | |
| 232. |
Except for monatomic gases, the molal heat capacity at constant volume for all gases is _____________ Kcal/Kg mole.° K? |
| A. | 3 |
| B. | > 3 |
| C. | < 3 |
| D. | < 1 |
| Answer» C. < 3 | |
| 233. |
______________ equation gives the effect of temperature on heat of reaction ? |
| A. | Kirchoff’s |
| B. | Maxwell’s |
| C. | Antoine |
| D. | Kistyakowsky |
| Answer» B. Maxwell’s | |
| 234. |
Equal masses of CH4 and H2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is___________________? |
| A. | 1/9 |
| B. | 8/9 |
| C. | 1/2 |
| D. | 5/9 |
| Answer» C. 1/2 | |
| 235. |
Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole? |
| A. | 46 |
| B. | 92 |
| C. | -23 |
| D. | -92 |
| Answer» C. -23 | |
| 236. |
Enthalpy of a vapor gas mixture may be increased by increasing the________________? |
| A. | Temperature at constant humidity |
| B. | Humidity at constant temperature |
| C. | Temperature and the humidity |
| D. | All A., B. & C. |
| Answer» E. | |
| 237. |
Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of________________? |
| A. | Mixing |
| B. | Adsorption |
| C. | Wetting |
| D. | Complete wetting |
| Answer» E. | |
| 238. |
Elements in a periodic table are arranged in order of their__________________? |
| A. | Atomic number |
| B. | Mass number |
| C. | Atomic weight |
| D. | Metallic characteristics |
| Answer» B. Mass number | |
| 239. |
During a phase change process like sublimation, vaporisation, melting etc., the specific ____________ does not change? |
| A. | Enthalpy |
| B. | Gibbs free energy |
| C. | Internal energy |
| D. | Entropy |
| Answer» C. Internal energy | |
| 240. |
Dry air is a mixture of__________________? |
| A. | Vapors |
| B. | Gases |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. & B. | |
| 241. |
Dissolving a solute in a solvent does not change its________________? |
| A. | Specific heat |
| B. | Vapour pressure |
| C. | Viscosity |
| D. | None of these |
| Answer» E. | |
| 242. |
Disappearance of snow in subzero weather exemplifies the process of_________________? |
| A. | Evaporation |
| B. | Sublimation |
| C. | Vaporisation |
| D. | Melting |
| Answer» C. Vaporisation | |
| 243. |
Diffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume ‘X’ diffuses twice as fast as another perfume ‘Y’; what is the molecular weight of ‘Y’, if the vapor density of gas ‘X’ is 2? Molecular weight of gas ‘X’ is to be assumed to be 2 ? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 16 |
| Answer» E. | |
| 244. |
Density of carbon dioxide is _________________ kg/Nm3 ? |
| A. | 44/22400 |
| B. | 44/22.4 |
| C. | 22.4/44 |
| D. | None of these |
| Answer» C. 22.4/44 | |
| 245. |
Cp is expressed in S.I. unit as_______________? |
| A. | J/kg.°K |
| B. | 0°K |
| C. | W/m2.°C |
| D. | W/m.°K |
| Answer» B. 0°K | |
| 246. |
Cp equals Cv at________________? |
| A. | 0°C |
| B. | 0°K |
| C. | 0°F |
| D. | 0°R |
| Answer» C. 0°F | |
| 247. |
Cp – Cv for an ideal gas is equal to________________? |
| A. | R |
| B. | R/2 |
| C. | 2R |
| D. | 3R |
| Answer» B. R/2 | |
| 248. |
‘Cox’ chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the_____________? |
| A. | Temperature vs. log (vapor pressure) |
| B. | Vapor pressure vs. log (temperature) |
| C. | Log (temperature) vs. log (vapor pressure) |
| D. | Vapor pressure vs. temperature |
| Answer» B. Vapor pressure vs. log (temperature) | |
| 249. |
Concentration of a solution expressed in terms of _______________ is independent of temperature? |
| A. | Molarity |
| B. | Normality |
| C. | Molality |
| D. | None of these |
| Answer» D. None of these | |
| 250. |
Clausius Clapeyron equation applies to the _____________ process? |
| A. | Sublimation |
| B. | Melting |
| C. | Vaporisation |
| D. | All A., B. & C. |
| Answer» E. | |