MCQOPTIONS
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MCQOPTIONS
This section includes 1331 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Acetone is produced by catalytic dehydrogenation of_________________? |
| A. | Phenol |
| B. | Naphthalene |
| C. | Isopropanol |
| D. | Ethyl benzene |
| Answer» D. Ethyl benzene | |
| 552. |
Absorption of SO3 in 97% H2SO4 is_______________? |
| A. | Exothermic |
| B. | Endothermic |
| C. | Not possible |
| D. | None of these |
| Answer» B. Endothermic | |
| 553. |
A ‘unit process’ is exemplified by the___________________? |
| A. | Distillation |
| B. | Hydrogenation of oils |
| C. | Absorption |
| D. | Humidification |
| Answer» C. Absorption | |
| 554. |
A unit operation is exemplified by the process of ___________________? |
| A. | Reduction |
| B. | Desorption |
| C. | Nitration |
| D. | Combustion |
| Answer» C. Nitration | |
| 555. |
A substance produced by a living organism and capable of anti-microbial activity is called a/an ____________________? |
| A. | Antibiotic |
| B. | Antiseptic |
| C. | Disinfectant |
| D. | None of these |
| Answer» B. Antiseptic | |
| 556. |
A mixture of chlorine & sodium bromide acts as a/an_________________? |
| A. | Insecticides |
| B. | Analgesic drug |
| C. | Fire retardant |
| D. | Hydrogenation catalyst |
| Answer» D. Hydrogenation catalyst | |
| 557. |
A mineral is termed as ‘ore’, if ____________________? |
| A. | A metal can be economically extracted from it |
| B. | It contains ≥ 40% metal |
| C. | The metal present in it is costly |
| D. | All A , B. and C. |
| Answer» B. It contains ≥ 40% metal | |
| 558. |
A good quality coal should have ______________________? |
| A. | Low fusion point of ash |
| B. | High ash content |
| C. | High sulphur content |
| D. | None of these |
| Answer» E. | |
| 559. |
A bio-catalyst produced by living cells which acts independent of the cell is called a/an_______________? |
| A. | Substrate |
| B. | Enzyme |
| C. | Nutrient |
| D. | None of these |
| Answer» C. Nutrient | |
| 560. |
99.5% purity oxygen is used in_____________________? |
| A. | Cutting and welding by oxy-acetylene flame |
| B. | Hospitals for medicinal purposes |
| C. | Gas masks and artificial breathing apparatus |
| D. | All A, B, and C. |
| Answer» E. | |
| 561. |
90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at _____________ °C ? |
| A. | < 0 |
| B. | 10-30 |
| C. | 250-280 |
| D. | 500-600 |
| Answer» C. 250-280 | |
| 562. |
20% oleum means that in 100 kg oleum, there are 20 kg of_____________________? |
| A. | SO3 and 80kg of H2SO4 |
| B. | H2SO4 and 80kg of SO3 |
| C. | SO3 for each 100 kg of H2SO4 |
| D. | None of these |
| Answer» B. H2SO4 and 80kg of SO3 | |
| 563. |
10% oleum comprises of 10% free_________________? |
| A. | SO2 |
| B. | H2SO3 |
| C. | SO3 |
| D. | H2SO4 |
| Answer» D. H2SO4 | |
| 564. |
In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by |
| A. | increasing the oxygen concentration. |
| B. | putting more quantity of V2O5 catalyst in the converter. |
| C. | removing some quantity of SO3 during intermediate stage. |
| D. | maintaining low temperature & pressure in the converter. |
| Answer» D. maintaining low temperature & pressure in the converter. | |
| 565. |
Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and(ii) __________ for ammonia synthesis. |
| A. | i) - Ni/Al2O₃; (ii) - Cu - ZnO/Al2O₃ |
| B. | i) - Fe/Al2O₃; (ii) - Cu - ZnO/Al2O₃ |
| C. | i) - Ni/Al2O₃; (ii) - Fe/Al2O₃ |
| D. | i) - Fe/Al2O₃; (ii) - Ni/Al2O₃ |
| Answer» D. i) - Fe/Al2O₃; (ii) - Ni/Al2O₃ | |
| 566. |
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically |
| A. | cyclo trimethylene trinitramine. |
| B. | trinitro resorcinol. |
| C. | cyclo tetramethylene tetranitramine. |
| D. | trinitro benzene. |
| Answer» B. trinitro resorcinol. | |
| 567. |
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the |
| A. | L.D. converter |
| B. | blast furnace |
| C. | rotary kiln |
| D. | recuperator |
| Answer» E. | |
| 568. |
CaSO₄ .1/2H₂O is known as |
| A. | blue vitriol |
| B. | plaster of Paris |
| C. | gypsum |
| D. | zeolite |
| Answer» C. gypsum | |
| 569. |
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate |
| A. | is prone to thermal decomposition. |
| B. | has high water solubility and is unstable. |
| C. | is soluble in ammonium chloride and potassium chloride solution. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 570. |
In multistage equilibrium conversion of SO₂ to SO₃ (2SO₂ + O₂ ↔ 2SO₃), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO₂ to SO₃ can be increased by |
| A. | increasing the oxygen concentration. |
| B. | putting more quantity of V₂O₅ catalyst in the converter. |
| C. | removing some quantity of SO₃ during intermediate stage. |
| D. | maintaining low temperature & pressure in the converter. |
| Answer» D. maintaining low temperature & pressure in the converter. | |
| 571. |
Main constituents of portland cement are calcium aluminate and |
| A. | gypsum |
| B. | silicates |
| C. | sodium silicate |
| D. | carbonates |
| Answer» C. sodium silicate | |
| 572. |
Which of the following is the main constituent of the mother liquor produced in salt industry ? |
| A. | Quick lime |
| B. | Glauber's salt |
| C. | Salt petre |
| D. | Bromine |
| Answer» E. | |
| 573. |
For the hydrogenation of oils __________ (A) __________ is commonly used as catalyst and __________ (B) __________ is a catalyst poison. |
| A. | (A) platinum (B) sulphur |
| B. | (A) palladium (B) oxygen |
| C. | (A) nickel (B) sulphur |
| D. | (A) nickel (B) oxygen |
| Answer» D. (A) nickel (B) oxygen | |
| 574. |
At a given temperature, the equilibrium yield of SO₃ obtained from the oxidation of SO₂ is proportional to (where, P = pressure of the system ) |
| A. | P |
| B. | √P |
| C. | P² |
| D. | 1/P |
| Answer» C. P² | |
| 575. |
Which of the following is not an antibiotic ? |
| A. | Penicillin |
| B. | Streptomycin |
| C. | Tetracyclin |
| D. | Quinine |
| Answer» E. | |
| 576. |
Yellow glycerine is made into white, using |
| A. | activated carbon |
| B. | diatomaceous earth |
| C. | bauxite |
| D. | bentonite |
| Answer» B. diatomaceous earth | |
| 577. |
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in |
| A. | pyrolysis of oil. |
| B. | sintering of porous catalyst. |
| C. | hydrogen embrittlement. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 578. |
Which one of the following is not an elastomer ? |
| A. | Polyisoperene |
| B. | Neoprene |
| C. | Nitrile-butadiene |
| D. | None of these |
| Answer» E. | |
| 579. |
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as |
| A. | it is very corrosive at elevated temperature. |
| B. | its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced). |
| C. | it decomposes on further increasing the temperature. |
| D. | none of these. |
| Answer» C. it decomposes on further increasing the temperature. | |
| 580. |
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ? |
| A. | Cl₂ & Na |
| B. | Cl₂ & H₂ |
| C. | O₂ & H₂ |
| D. | Cl₂, H₂ & NaOH solution. |
| Answer» E. | |
| 581. |
Which of the following is not a product of coal tar distillation ? |
| A. | Anthracene |
| B. | Cresote oil |
| C. | Carbolic oil |
| D. | None of these |
| Answer» E. | |
| 582. |
Which of the following is a constituent of coffee ? |
| A. | Caffeine |
| B. | Nicotine |
| C. | Calgon |
| D. | Lignin |
| Answer» B. Nicotine | |
| 583. |
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ? |
| A. | Slag cement |
| B. | Glasses |
| C. | Porcelain/Potteries |
| D. | Teflon |
| Answer» E. | |
| 584. |
In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst |
| A. | gives higher conversion efficiency. |
| B. | has a longer life and is not poisoned by arsenic. |
| C. | handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 585. |
Which of the following is used as a coagulant in treating turbid water ? |
| A. | Chlorine |
| B. | Ferric sulphate |
| C. | Calcium sulphate |
| D. | Activated carbon |
| Answer» C. Calcium sulphate | |
| 586. |
Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and |
| A. | sulphuric acid |
| B. | phosphoric acid |
| C. | hydrochloric acid |
| D. | hydroflouric acid |
| Answer» B. phosphoric acid | |
| 587. |
Which of the following contains least amount of N₂ ? |
| A. | Coke oven gas |
| B. | Blast furnace gas |
| C. | Producer gas |
| D. | Water gas (blue gas). |
| Answer» B. Blast furnace gas | |
| 588. |
Which of the following processes can remove both temporary as well as permanent hardness of water ? |
| A. | Filtration |
| B. | Boiling |
| C. | Distillation |
| D. | None of these |
| Answer» D. None of these | |
| 589. |
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the |
| A. | diamine and the ring. |
| B. | dibasic acid and the ring. |
| C. | diamine and the dibasic acid. |
| D. | none of these. |
| Answer» D. none of these. | |
| 590. |
Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis. |
| A. | i - Ni/Al₂O₃; ii - Cu - ZnO/Al₂O₃ |
| B. | i - Fe/Al₂O₃; ii - Cu - ZnO/Al₂O₃ |
| C. | i - Ni/Al₂O₃; ii - Fe/Al₂O₃ |
| D. | i - Fe/Al₂O₃; ii - Ni/Al₂O₃ |
| Answer» D. i - Fe/Al₂O₃; ii - Ni/Al₂O₃ | |
| 591. |
Brackish water which contains mostly dissolved salt, can be purified by the __________ process. |
| A. | reverse osmosis |
| B. | sand filter |
| C. | lime soda |
| D. | permutit |
| Answer» B. sand filter | |
| 592. |
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ? |
| A. | Xanthates |
| B. | Stearic acid |
| C. | Calcium & aluminium stearate |
| D. | Formic acid |
| Answer» D. Formic acid | |
| 593. |
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent. |
| A. | cationic |
| B. | anionic |
| C. | amphoteric |
| D. | semi polar |
| Answer» C. amphoteric | |
| 594. |
Which of the following is an explosive ? |
| A. | Nitroglycerene |
| B. | Trintrotoluene (TNT) |
| C. | Cellulose nitrate |
| D. | All (a), (b), and (c) |
| Answer» E. | |
| 595. |
Soap cannot be used with hard water, because |
| A. | hard water contains sulphate. |
| B. | they form insoluble calcium soaps which precipitate. |
| C. | they attract back the removed dirt. |
| D. | none of these. |
| Answer» C. they attract back the removed dirt. | |
| 596. |
Which of the following is used as a binding material in soap to improve soap texture ? |
| A. | Rosin |
| B. | Borax |
| C. | Benzyl acetate |
| D. | Sodium carbonate |
| Answer» C. Benzyl acetate | |
| 597. |
Which of the following processes does not produce Cl₂ as a co-product during the manufacture of caustic soda ? |
| A. | Diaphragm electrolytic cell process |
| B. | Mercury electrolytic cell process |
| C. | Lime-soda process |
| D. | None of these |
| Answer» D. None of these | |
| 598. |
Which of the following coals has the highest calorific value ? |
| A. | Lignite |
| B. | Sub-bituminous |
| C. | Anthracite |
| D. | Peat |
| Answer» D. Peat | |
| 599. |
Pencillin, an antibiotic drug was discovered by |
| A. | Alexender |
| B. | Flaming |
| C. | Dr. Zivago |
| D. | none of these |
| Answer» B. Flaming | |
| 600. |
Which of the following is an ore of iron ? |
| A. | Galena |
| B. | Chalcopyrite |
| C. | Hematite |
| D. | Bauxite |
| Answer» D. Bauxite | |