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.
| 301. |
A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container___________________? |
| A. | Will be greater than 298 K |
| B. | Will be 298 K |
| C. | Will be less than 298 K |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 302. |
A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________? |
| A. | Atomic weight of the metal is 4 |
| B. | Equivalent weight of the metal is 4 |
| C. | Atomic weight of the metal is 2 |
| D. | Equivalent weight of the metal is 8 |
| Answer» C. Atomic weight of the metal is 2 | |
| 303. |
A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal______________? |
| A. | Kinetic energy |
| B. | Intermolecular forces of attraction |
| C. | Potential energy |
| D. | Total energy |
| Answer» B. Intermolecular forces of attraction | |
| 304. |
A ‘limiting reactant’ is the one, which decides the ____________ in the chemical reaction? |
| A. | Equilibrium constant |
| B. | Conversion |
| C. | Rate constant |
| D. | None of these |
| Answer» C. Rate constant | |
| 305. |
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 | |
| 306. |
A gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c? |
| A. | 283 |
| B. | 566 |
| C. | 293 |
| D. | 141.5 |
| Answer» D. 141.5 | |
| 307. |
A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2; then the partial pressure of N2 in the mixture will be _____________ kgf/cm2 ? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 308. |
A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be________________? |
| A. | 0°C |
| B. | 0°K |
| C. | -136.5°C |
| D. | -136.5°K |
| Answer» D. -136.5°K | |
| 309. |
A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be_______________? |
| A. | -136.5°C |
| B. | – 136.5°K |
| C. | -273°C |
| D. | 0°K |
| Answer» B. – 136.5°K | |
| 310. |
A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is_________________? |
| A. | N2O4 |
| B. | N2O5 |
| C. | N2O3 |
| D. | None of these |
| Answer» C. N2O3 | |
| 311. |
A chemical process is said to occur under unsteady state, if the_________________? |
| A. | Inventory changes do not take place |
| B. | Ratio of streams entering/leaving are independent of time |
| C. | Flow rates & composition both are time dependent |
| D. | None of these |
| Answer» D. None of these | |
| 312. |
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 | |
| 313. |
A bypass stream in a chemical process is useful, because it___________________? |
| A. | Facilitates better control of the process |
| B. | Improves the conversion |
| C. | Increases the yield of products |
| D. | None of these |
| Answer» B. Improves the conversion | |
| 314. |
A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________? |
| A. | 3 kmole/hr |
| B. | 4 kmole/hr |
| C. | 5 kmole/hr |
| D. | 6 kmole/hr |
| Answer» D. 6 kmole/hr | |
| 315. |
80 kg of Na2SO4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na2SO4 .10H2O crystals separate out. The weight fraction of Na2SO4 in the remaining solution is_________________? |
| A. | 0.00 |
| B. | 0.18 |
| C. | 0.24 |
| D. | 1.00 |
| Answer» C. 0.24 | |
| 316. |
6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be ______________ gm? |
| A. | 0.5 |
| B. | 1 |
| C. | 3 |
| D. | 5 |
| Answer» B. 1 | |
| 317. |
500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be _____________ mm Hg? |
| A. | 650 |
| B. | 700 |
| C. | 600 |
| D. | 375 |
| Answer» B. 700 | |
| 318. |
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 | |
| 319. |
2 litres of nitrogen at N.T.P. weighs ______________ gms ? |
| A. | 14 |
| B. | 2.5 |
| C. | 28 |
| D. | 1.25 |
| Answer» C. 28 | |
| 320. |
1m3 is approximately equal to_________________? |
| A. | 28 litres |
| B. | 35 ft3 |
| C. | 4.5 litres |
| D. | 4.5 ft3 |
| Answer» C. 4.5 litres | |
| 321. |
1 torr is equivalent to_________________? |
| A. | 1 mm Hg |
| B. | 1 Pascal |
| C. | 1 atm |
| D. | 1 mm wc |
| Answer» B. 1 Pascal | |
| 322. |
1 ata is equivalent to_________________? |
| A. | 1 atm |
| B. | 10 torr |
| C. | 0.98 Pascal |
| D. | 1 kgf/cm2 |
| Answer» E. | |
| 323. |
1 kg/cm2 is equal to________________? |
| A. | 760 torr |
| B. | 1 KPa |
| C. | 10 metres of water column |
| D. | 1 metre of water column |
| Answer» D. 1 metre of water column | |
| 324. |
1 bar is almost equal to __________________________ atmosphere? |
| A. | 1 |
| B. | 10 |
| C. | 100 |
| D. | 1000 |
| Answer» B. 10 | |
| 325. |
1 kg/m2 is equal to ______________ mm water column? |
| A. | 1 |
| B. | 10 |
| C. | 100 |
| D. | 1000 |
| Answer» B. 10 | |
| 326. |
1 Kcal/kg. °C is equivalent to _______________ BTU/lb. °F ? |
| A. | 1 |
| B. | 2.42 |
| C. | 4.97 |
| D. | None of these |
| Answer» B. 2.42 | |
| 327. |
1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is__________________? |
| A. | C4H9OH |
| B. | C3H21OH |
| C. | (C2H4)2H2.OH |
| D. | C2H33OH |
| Answer» B. C3H21OH | |
| 328. |
1 BTU/lb.←°F is equivalent to ____________ kcal/kg.°C? |
| A. | 1 |
| B. | 2.42 |
| C. | 1.987 |
| D. | 4.97 |
| Answer» B. 2.42 | |
| 329. |
1 gm mole of methane (CH4) contains_________________? |
| A. | 6.02 × 1023 atoms of hydrogen |
| B. | 4 gm atoms of hydrogen |
| C. | 3.01 × 1023 molecules of methane |
| D. | 3 gms of carbon |
| Answer» C. 3.01 × 1023 molecules of methane | |
| 330. |
1 torr is equal to ______________ mm Hg column? |
| A. | 1 |
| B. | 0.1 |
| C. | 10 |
| D. | 1000 |
| Answer» B. 0.1 | |
| 331. |
1 Pascal (unit of pressure) is equal to _______________ N/m2 ? |
| A. | 10 |
| B. | 1 |
| C. | 0.1 |
| D. | 1000 |
| Answer» C. 0.1 | |
| 332. |
1 BTU/ft3 is approximately equal to _____________ kcal/m3? |
| A. | 1 |
| B. | 9 |
| C. | 4 |
| D. | 252 |
| Answer» C. 4 | |