MCQOPTIONS
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MCQOPTIONS
This section includes 336 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. |
_The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.$? |
| A. | Increases |
| B. | Decreases |
| C. | Remains unchanged |
| D. | Either A or B; depends on the liquid |
| Answer» C. Remains unchanged | |
| 202. |
_Number of gm moles of solute dissolved in one litre of a solution is called its$? |
| A. | Equivalent weight |
| B. | Molarity |
| C. | Molality |
| D. | Normality |
| Answer» C. Molality | |
| 203. |
_Addition of a non-volatile solute to a solvent produces a __________ in its solvent.$? |
| A. | Freezing point elevation |
| B. | Boiling point depression |
| C. | Vapor pressure lowering |
| D. | All of the above |
| Answer» D. All of the above | |
| 204. |
_One micron is equal to __________ cm.$? |
| A. | 10-2 |
| B. | 10-4 |
| C. | 10-6 |
| D. | 10-8 |
| Answer» C. 10-6 | |
| 205. |
_Applicability of Claussius-Clapeyron equation is subject to the condition that the$? |
| A. | Vapor follows ideal gas law |
| B. | Volume in the liquid state is negligible |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 206. |
_Which of the following is insensitive to changes in pressure?$? |
| A. | Heat of vaporisation |
| B. | Melting point |
| C. | Heat of fusion |
| D. | Both B & C |
| Answer» E. | |
| 207. |
_Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the$? |
| A. | Recycling |
| B. | Purging |
| C. | Bypassing |
| D. | Recirculation |
| Answer» C. Bypassing | |
| 208. |
_The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is __________ kg mole.$? |
| A. | 1 |
| B. | 0 |
| C. | 16 |
| D. | 44 |
| Answer» C. 16 | |
| 209. |
_Pick out the wrong unit conversion of temperature.$? |
| A. | °R = 273 + °F |
| B. | Temperature difference of 1°K = 1°C = 9/5 °F |
| C. | °C = (F- 32) x 0.555 |
| D. | °F = (°C + 17.778) x 1.8 |
| Answer» B. Temperature difference of 1¬¨‚àûK = 1¬¨‚àûC = 9/5 ¬¨‚àûF | |
| 210. |
_How much O‚ÇÇ can be obtained from 90 kg of water?$? |
| A. | 32 kg |
| B. | 80 kg |
| C. | 64 kg |
| D. | 90 kg |
| Answer» C. 64 kg | |
| 211. |
_For an ideal solution, the total vapor pressure varies __________ with the composition(expressed as mole fraction).$? |
| A. | Inversely |
| B. | Exponentially |
| C. | Linearly |
| D. | Negligibly |
| Answer» D. Negligibly | |
| 212. |
_The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times.$? |
| A. | 1/2 |
| B. | 4 |
| C. | ‚à ö2 |
| D. | 1/4 |
| Answer» D. 1/4 | |
| 213. |
_Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is$? |
| A. | 1.72 |
| B. | 0.58 |
| C. | 0.5 |
| D. | 0.2 |
| Answer» C. 0.5 | |
| 214. |
_At standard conditions, N₂ + 2O₂ ⇋ 2NO₂; ΔG° = 100 kJ/moleNO + ½O₂ ⇋ 2NO₂; ΔG° = -35 kJ/moleThe standard free energy of formation of NO in kJ/mole is$? |
| A. | 15 |
| B. | 30 |
| C. | 85 |
| D. | 170 |
| Answer» D. 170 | |
| 215. |
_A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct?$? |
| A. | Xc > Xs |
| B. | Xc = Xs |
| C. | Xc < Xs |
| D. | Xc greater/less than Xs depending on the length of the cylinder |
| Answer» D. Xc greater/less than Xs depending on the length of the cylinder | |
| 216. |
_Average molecular weight of air is about$? |
| A. | 21 |
| B. | 29 |
| C. | 23 |
| D. | 79 |
| Answer» C. 23 | |
| 217. |
_Molality is defined as the number of gm moles of solute per __________ of solvent.$? |
| A. | Litre |
| B. | Kg |
| C. | Gm mole |
| D. | Gm |
| Answer» C. Gm mole | |
| 218. |
_Kinematic viscosity of 1 m² /second is equivalent to __________ stokes.$? |
| A. | 10 |
| B. | 102 |
| C. | 103 |
| D. | 104 |
| Answer» E. | |
| 219. |
_Which of the following is not a unit of length?$? |
| A. | Parsec |
| B. | Angstrom |
| C. | Barn |
| D. | Fermi |
| Answer» D. Fermi | |
| 220. |
_Colligative properties of a dilute solution are those, which depend entirely upon the$? |
| A. | Chemical composition of the solute |
| B. | Constitution of the solute |
| C. | Number of solute molecules contained in a given volume of the solvent |
| D. | None of these |
| Answer» C. Number of solute molecules contained in a given volume of the solvent | |
| 221. |
_Pick out the wrong statement.$? |
| A. | To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of solution A required is 40 kg |
| B. | 1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess reactant supplied is 25 |
| C. | A gas bubble at a pressure of Pg is passed through a solvent with a saturation vapour pressure of Ps. If the time of passage of the bubble is long and air is insoluble in the sol |
| D. | A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The solubility .of the solute is C‚ÇÅ. The output rate |
| Answer» E. | |
| 222. |
The number of atoms of oxygen present in 11.2 litres of ozone (O‚ÇÉ) at N.T.P. are$? |
| A. | 3.01 x 10²² |
| B. | 6.02 x 10²³ |
| C. | 9.03 x 10²⁴ |
| D. | 1.20 x 10²⁴ |
| Answer» D. 1.20 x 10¬¨‚⧂Äö√Ö¬• | |
| 223. |
In the reaction, represented by Na‚ÇÇCO‚ÇÉ + HC‚ÇÅ ‚Üí NaHO‚ÇÉ + NaCl, the equivalent weight of Na‚ÇÇCO‚ÇÉ is$? |
| A. | 53 |
| B. | 5.3 |
| C. | 106 |
| D. | 10.6 |
| Answer» D. 10.6 | |
| 224. |
A car tyre of volume 0.057 m³ is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is$? |
| A. | 380 |
| B. | 630 |
| C. | 760 |
| D. | 880 |
| Answer» C. 760 | |
| 225. |
Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity?Vapour pressure of water at 20°C is 17.5 mm Hg.$? |
| A. | 80.38 |
| B. | 80 |
| C. | 79.62 |
| D. | 78.51 |
| Answer» D. 78.51 | |
| 226. |
Claussius Clapeyron equation applies to the __________ process.$? |
| A. | Sublimation |
| B. | Melting |
| C. | Vaporisation |
| D. | All of the above |
| Answer» E. | |
| 227. |
pH value of a solution containing 1 gm of hydrogen ion per litre will be$? |
| A. | 0 |
| B. | 1 |
| C. | 7 |
| D. | 10 |
| Answer» B. 1 | |
| 228. |
At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be$? |
| A. | Significantly less than 4.69 atm |
| B. | Nearly equal to 4.69 atm |
| C. | Significantly more than 4.69 atm |
| D. | Indeterminate due to lack of data |
| Answer» D. Indeterminate due to lack of data | |
| 229. |
The latent heat of vaporisation$? |
| A. | Decreases with increased temperature |
| B. | Decreases as pressure increases |
| C. | Becomes zero at the critical point |
| D. | All of the above |
| Answer» E. | |
| 230. |
__________ chart is a graph related to Antonie equation.$? |
| A. | Ostwald |
| B. | Cox |
| C. | Mollier's |
| D. | Enthalpy-concentration |
| Answer» C. Mollier's | |
| 231. |
Measurement of the amount of dry gas collected over water from volume of moist gas is based on the$? |
| A. | Charle's law |
| B. | Dalton's law of partial pressures |
| C. | Avogadro's hypothesis |
| D. | Boyle's law |
| Answer» C. Avogadro's hypothesis | |
| 232. |
In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is$? |
| 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 | |
| 233. |
__________ kg of CaCO‚ÇÉ on heating will give 56 kg of CaO.$? |
| A. | 56 |
| B. | 100 |
| C. | 144 |
| D. | 1000 |
| Answer» C. 144 | |
| 234. |
1m³ is approximately equal to$? |
| A. | 28 litres |
| B. | 35 ft³ |
| C. | 4.5 litres |
| D. | 4.5 ft³ |
| Answer» C. 4.5 litres | |
| 235. |
1 kgf/cm² is not equal to$? |
| A. | 1 torr |
| B. | 1 bar |
| C. | 10000 mm wc |
| D. | 100 KPa = 100 000 N/m² |
| Answer» B. 1 bar | |
| 236. |
The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 x __________$? |
| A. | 1026 |
| B. | 1023 |
| C. | 1020 |
| D. | 1019 |
| Answer» D. 1019 | |
| 237. |
Cp equals Cv at$? |
| A. | 0°C |
| B. | 0°K |
| C. | 0°F |
| D. | 0°R |
| Answer» C. 0¬¨‚àûF | |
| 238. |
The effect of pressure on the heat capacity of the gases __________ is negligible.$? |
| A. | At pressure below one atmosphere |
| B. | Below the critical temperature |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 239. |
1 torr is equal to __________ mm Hg column.$? |
| A. | 1 |
| B. | 0.1 |
| C. | 10 |
| D. | 1000 |
| Answer» B. 0.1 | |
| 240. |
Solutions which distil without change in composition are called$? |
| A. | Ideal |
| B. | Saturated |
| C. | Supersaturated |
| D. | Azeotropic |
| Answer» E. | |
| 241. |
Recycling in a chemical process facilitates$? |
| A. | Increased yield |
| B. | Enrichment of product |
| C. | Heat conservation |
| D. | All of the above |
| Answer» E. | |
| 242. |
Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the$? |
| A. | Temperature |
| B. | Volume of solution |
| C. | Moles of non-volatile solute |
| D. | None of these |
| Answer» B. Volume of solution | |
| 243. |
Total energy at a point comprises of __________ energy.$? |
| A. | Potential & kinetic |
| B. | Pressure |
| C. | Internal |
| D. | All of the above |
| Answer» E. | |
| 244. |
In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest?$? |
| A. | 30 c.c acid and 30 c.c base |
| B. | 20 c.c acid and 25 c.c base |
| C. | 15 c.c acid and 35 c.c base |
| D. | 35 c.c acid and 15 c.c base |
| Answer» B. 20 c.c acid and 25 c.c base | |
| 245. |
Solutions having the same osmotic pressure are called __________ solutions.$? |
| A. | Dilute |
| B. | Ideal |
| C. | Isotonic |
| D. | Saturated |
| Answer» D. Saturated | |
| 246. |
The heat of vaporisation __________ with increase in pressure.$? |
| A. | Increases |
| B. | Decreases |
| C. | Becomes zero at critical pressure |
| D. | Both B and C |
| Answer» E. | |
| 247. |
The total number of atoms in 8.5 gm of NH‚ÇÉ is __________ x 1023.$? |
| A. | 9.03 |
| B. | 3.01 |
| C. | 1.204 |
| D. | 6.02 |
| Answer» B. 3.01 | |
| 248. |
Pick out the wrong unit conversion of calorific value.$? |
| A. | 1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg |
| B. | 1 BTU/ft³ = 8.9 kcal/m³ = 0.038 MJ/m³ |
| C. | 1 BTU/lb = 2.3 kcal/kg |
| D. | 1 kcal/m³ = 0.1124 BTU/ft³ |
| Answer» D. 1 kcal/m¬¨‚â• = 0.1124 BTU/ft¬¨‚â• | |
| 249. |
Kopp's rule is concerned with the calculation of$? |
| A. | Thermal conductivity |
| B. | Heat capacity |
| C. | Viscosity |
| D. | Surface tension |
| Answer» C. Viscosity | |
| 250. |
The heat capacity of most substances is greater for the __________ state.$? |
| A. | Solid |
| B. | Liquid |
| C. | Gaseous |
| D. | None of these |
| Answer» C. Gaseous | |