MCQOPTIONS
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MCQOPTIONS
This section includes 689 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. |
N₂ + 2O₂ -> 2NO₂, what is the extent of reaction if 6 moles of NO₂ is produced? |
| A. | 3 |
| B. | 6 |
| C. | 12 |
| D. | 18 |
| Answer» B. 6 | |
| 202. |
CH₄ + 2O₂ -> CO₂ + 2H₂O, what is the extent of reaction if only 50% of 96 grams of CH₄ is consumed? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 203. |
4FeS₂ + 11O₂ -> 2Fe₂O₃ + 8SO₂, what is the extent of reaction if 512 grams of SO₂ is produced? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 204. |
H₂O₂ + H₂ -> 2H₂O, if the extent of reaction is 10, how much water is produced? |
| A. | 10 moles |
| B. | 20 moles |
| C. | 30 moles |
| D. | 40 moles |
| Answer» C. 30 moles | |
| 205. |
10 moles of C₆H₁₂ reacted with 18 moles of O₂, how many moles of CO₂ will produce? |
| A. | 3 |
| B. | 6 |
| C. | 9 |
| D. | 12 |
| Answer» E. | |
| 206. |
40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is |
| A. | 1/2 |
| B. | 1/3 |
| C. | 1/4 |
| D. | 2/3 |
| Answer» C. 1/4 | |
| 207. |
20 grams of NaOH is reacted with excess HCl, how much NaCl will it produce? |
| A. | 29.25 grams |
| B. | 58.5 grams |
| C. | 117 grams |
| D. | 234 grams |
| Answer» B. 58.5 grams | |
| 208. |
The pressure of 'V' litres of a dry gas is increased from 1 to 2 kgf/cm² at a constant temperature. The new volume will become |
| A. | V/2 |
| B. | 2V |
| C. | V/4 |
| D. | V² |
| Answer» B. 2V | |
| 209. |
If 1 Nm³ of O₂ contains 'N' number of molecules, then number of molecules in 2 Nm³ of SO₂ will be |
| A. | N |
| B. | N/2 |
| C. | 2N |
| D. | 4N |
| Answer» D. 4N | |
| 210. |
C₅H₁₂ + xO₂ -> yCO₂ + zH₂O, what is the value of x + y*z? |
| A. | 24 |
| B. | 38 |
| C. | 46 |
| D. | 54 |
| Answer» C. 46 | |
| 211. |
wC₃H₆O₃ + xO₂ –> yCO₂ + zH₂O, what is the value of w + x + y + z? |
| A. | 3 |
| B. | 6 |
| C. | 10 |
| D. | 14 |
| Answer» E. | |
| 212. |
wC₃H₇O₄ + xO₂ -> yCO₂ + zH₂O, what is the value of w + x + y + z? |
| A. | 21 |
| B. | 35 |
| C. | 41 |
| D. | 47 |
| Answer» D. 47 | |
| 213. |
Which of the following does stoichiometry of a reaction is all about? |
| A. | Extent of reaction |
| B. | Heat of reaction |
| C. | Amount of reactants and products |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 214. |
C₂H₄ + xO₂ -> 2CO₂ + yH₂O, what is the value of x + y? |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 8 |
| Answer» D. 8 | |
| 215. |
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 | |
| 216. |
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% | |
| 217. |
Which of the following is an exothermic reaction? |
| A. | Conversion of graphite to diamond |
| B. | Decomposition of water |
| C. | Dehydrogenation of ethane to ethylene |
| D. | None of these |
| Answer» E. | |
| 218. |
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are PvB and Pvw respectively. The partial pressure of benzene in air-vapour mixture is |
| A. | PvB |
| B. | XB.PvB |
| C. | (Patm - Pvw)xB |
| D. | XB.Patm |
| Answer» C. (Patm - Pvw)xB | |
| 219. |
On mixing 56 gm of CaO with 63 gm of HNO₃, the amount of Ca(NO₃)₂ formed is __________ gm. |
| A. | 82 |
| B. | 164 |
| C. | 41 |
| D. | 8.2 |
| Answer» B. 164 | |
| 220. |
pH value of H₂SO₄ (5% concentration) is |
| A. | 5 |
| B. | 7 |
| C. | > 7 |
| D. | < 7 |
| Answer» E. | |
| 221. |
How much O₂ can be obtained from 90 kg of water? |
| A. | 32 kg |
| B. | 80 kg |
| C. | 64 kg |
| D. | 90 kg |
| Answer» C. 64 kg | |
| 222. |
As per Kirchoff s equation, the heat of reaction is affected by the |
| A. | Pressure |
| B. | Volume |
| C. | Temperature |
| D. | Molecularity |
| Answer» D. Molecularity | |
| 223. |
One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to |
| A. | 1225 |
| B. | 1335 |
| C. | 1525 |
| D. | 1735 |
| Answer» E. | |
| 224. |
The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies |
| A. | 0 < Xw < 0.5 |
| B. | Xw = 0.5 |
| C. | 0.5 < Xw < 1.0 |
| D. | Xw = 1.0 |
| Answer» D. Xw = 1.0 | |
| 225. |
One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about |
| A. | 0.19 |
| B. | 0.33 |
| C. | 0.40 |
| D. | 0.67 |
| Answer» B. 0.33 | |
| 226. |
The density of a liquid is 1500 kg/m³. Its value in gin/litre will be equal to |
| A. | 1.5 |
| B. | 15 |
| C. | 150 |
| D. | 1500 |
| Answer» E. | |
| 227. |
The number of H⁺ in 1 c.c solution of pH 13 is |
| A. | 6.023 xl0¹³ |
| B. | 6.023 x 10¹⁰ |
| C. | 6.023xl0⁷ |
| D. | 10¹³ |
| Answer» D. 10¹³ | |
| 228. |
Which of the following expressions defines the Baume gravity scale for liquids lighter than water? |
| A. | °Be = (140/G) - 130 |
| B. | °Be = 200(G-1) |
| C. | °Be = 145 - (145/G) |
| D. | °Be = (400/G) - 400 |
| Answer» B. °Be = 200(G-1) | |
| 229. |
Which of the following gravity scales is used exclusively for liquids heavier than water? |
| A. | Baumme scale |
| B. | Twaddel scale |
| C. | API scale |
| D. | None of these |
| Answer» C. API scale | |
| 230. |
Which of the following expressions defines the Baume gravity scale for liquids heavier than water? |
| A. | (141.5/G) - 131.5 |
| B. | 145 - (145/G) |
| C. | 200(G-1) |
| D. | (400/G) - 400 |
| Answer» C. 200(G-1) | |
| 231. |
The pressure of 'V' litres of a dry gas is increased from 1 to 2 kgf/cm² at a constant temperature. The new volume will become |
| A. | V/2 |
| B. | 2V |
| C. | V/4 |
| D. | V² |
| Answer» B. 2V | |
| 232. |
How many phases are present at eutectic point? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | Unpredictable |
| Answer» D. Unpredictable | |
| 233. |
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 | |
| 234. |
6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H₂ produced will be __________ gm. gm. |
| A. | 0.5 |
| B. | 1 |
| C. | 3 |
| D. | 5 |
| Answer» B. 1 | |
| 235. |
Except for monoatomic 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 | |
| 236. |
The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes. This is the __________ law. |
| A. | Dalton's |
| B. | Amgat's |
| C. | GayLussac's |
| D. | Avogadro's |
| Answer» C. GayLussac's | |
| 237. |
The value of Trouton's ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids. |
| A. | Polar |
| B. | Non-polar |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 238. |
Which of the following is not a colligative property? |
| A. | Osmotic pressure |
| B. | Depression of freezing point |
| C. | Lowering of vapor pressure |
| D. | None of these |
| Answer» E. | |
| 239. |
At a temperature of 0°K, the molecules of a gas have only __________ energy. |
| A. | Rotational |
| B. | Vibrational |
| C. | Translational |
| D. | None of these |
| Answer» D. None of these | |
| 240. |
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 | |
| 241. |
A gaseous mixture contains 14 kg of N₂, 16 kg of O₂ and 17 kg of NH₃. The mole fraction of oxygen is |
| A. | 0.16 |
| B. | 0.33 |
| C. | 0.66 |
| D. | 0.47 |
| Answer» C. 0.66 | |
| 242. |
The molar composition of a gas is 10% H₂, 10% O₂, 30% CO₂ and balance H₂O. If 50% H₂O condenses, the final mole percent of H₂ in the gas on a dry basis will be be |
| A. | 10% |
| B. | 5% |
| C. | 18.18% |
| D. | 20% |
| Answer» E. | |
| 243. |
The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies |
| A. | XM < 0.5 |
| B. | XM = 0.5 |
| C. | 0.5 < XM < 0.64 |
| D. | XM ≥ 0.64 |
| Answer» E. | |
| 244. |
Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0⁻⁵m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10⁻³. The rate of evaporation of aniline is 2.97 x 10⁻⁴. Its units are |
| A. | Mole/s |
| B. | Mole/cm². s |
| C. | Mole/m² . s |
| D. | Kmole/m² . s |
| Answer» E. | |
| 245. |
1 kg/m² is equal to __________ mm water column. |
| A. | 1 |
| B. | 10 |
| C. | 100 |
| D. | 1000 |
| Answer» B. 10 | |
| 246. |
The hydroxyl ion (OH?) concentration in a solution having pH value 3 will be |
| A. | 10?? |
| B. | |
| Answer» B. | |
| 247. |
An aqueous solution of 2.45% by weight H₂SO₄ has a specific gravity of 1.011. The composition expressed in normality is |
| A. | 0.2500 |
| B. | 0.2528 |
| C. | 0.5000 |
| D. | 0.5055 |
| Answer» E. | |
| 248. |
At room temperature, the product [H⁺] [OH⁻] in a solution is 10⁻¹⁴ moles/litre. If, [OH⁻] = 10⁻⁶ moles/litre, then the pH of the solution will be |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 12 |
| Answer» C. 10 | |
| 249. |
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 | |
| 250. |
°API gravity of water at N.T.P. is about |
| A. | 0 |
| B. | 1 |
| C. | 10 |
| D. | 100 |
| Answer» D. 100 | |