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.
| 451. |
Concentration of NaOH solution produced by diaphragm electrolytic cell is about _______________ percent? |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» B. 25 | |
| 452. |
Concentration of hydrogen peroxide is done by_____________________? |
| A. | Crystallisation |
| B. | Vacuum crystallisation |
| C. | Atmospheric distillation |
| D. | Dehydration |
| Answer» C. Atmospheric distillation | |
| 453. |
Comparing sulphate process with sulphite process, we find that ______________ in the later ? |
| A. | Both temperature & pressure in the former is less than that |
| B. | Both temperature & pressure in the former is more than that |
| C. | Temperature is more in the former whereas pressure is more |
| D. | Pressure is more in the former whereas temperature is less |
| Answer» C. Temperature is more in the former whereas pressure is more | |
| 454. |
Commonly used glass is known as the _______________ glass? |
| A. | Flint |
| B. | Hard |
| C. | Pyrex |
| D. | Soda |
| Answer» E. | |
| 455. |
Common salt is generally not produced commonly by ________________ method from brine ? |
| A. | Freeze drying |
| B. | Electrolytic |
| C. | Solar evaporation |
| D. | Vacuum evaporation |
| Answer» B. Electrolytic | |
| 456. |
Commercially ethylene is produced from naphtha by ______________________? |
| A. | Catalytic cracking |
| B. | Catalytic dehydrogenation |
| C. | Pyrolysis |
| D. | Hydrocracking |
| Answer» E. | |
| 457. |
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is __________________? |
| A. | A slow reaction |
| B. | A discontinuous reaction (requiring regeneration of iron by water gas intermittently) |
| C. | Still in development stage (by employing fluidised bed technique) |
| D. | All A , B. and C |
| Answer» E. | |
| 458. |
Commercial production of Vanaspati is done by _______________ of edible vegetable oils ? |
| A. | Hydrogenation |
| B. | Oxidation |
| C. | Hydrolysis |
| D. | Hydrocracking |
| Answer» B. Oxidation | |
| 459. |
Commercial production of soda ash by Solvay process requires limestone, ___________________ as raw materials? |
| A. | Coke and sand |
| B. | Brine and coal |
| C. | Coke and caustic soda |
| D. | None of these |
| Answer» C. Coke and caustic soda | |
| 460. |
Commercial production of calcium carbide requires limestone and __________________ as raw materials? |
| A. | Coke |
| B. | Sand |
| C. | Soda ash |
| D. | Fuel oil |
| Answer» C. Soda ash | |
| 461. |
Coloured glass is obtained by mixing of colored salts. Addition of ___________________ oxide is done to impart greenish blue color to the glass? |
| A. | Chromium |
| B. | Arsenic |
| C. | Copper |
| D. | Manganese |
| Answer» D. Manganese | |
| 462. |
Coke used for the production of calcium carbide should have____________________? |
| A. | Low ash content |
| B. | Low ignition temperature |
| C. | High electrical resistivity |
| D. | All A , B. and C. |
| Answer» E. | |
| 463. |
Coke oven gas consists mainly of ____________________? |
| A. | H2, & CH4 |
| B. | CO, & CO2 |
| C. | H2, & CO |
| D. | CH4, & CO |
| Answer» B. CO, & CO2 | |
| 464. |
Coal tar is used as a___________________? |
| A. | Binding material for coal briquettes |
| B. | Fuel in rotary kiln |
| C. | Binder in making carbon electrodes |
| D. | All A , B. and C. |
| Answer» E. | |
| 465. |
Coagulant is used _________________ filtration? |
| A. | Before |
| B. | After |
| C. | During |
| D. | To avoid |
| Answer» B. After | |
| 466. |
CO & H2 are the constituents of___________________? |
| A. | Producer gas |
| B. | Water gas |
| C. | Coke oven gas |
| D. | All A., B. and C. |
| Answer» E. | |
| 467. |
Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture? |
| A. | CaO |
| B. | MnO2 |
| C. | ZnO |
| D. | FeS |
| Answer» D. FeS | |
| 468. |
Claude process of gas liquefaction employs___________________? |
| A. | Merely compression of gas beyond its critical pressure |
| B. | Joule-Thomson expansion cooling |
| C. | Heat exchange with colder stream |
| D. | Adiabatic expansion against a piston or in a turbine |
| Answer» E. | |
| 469. |
Chrome tanning and vegetable tanning are done for ________________? |
| A. | Light & heavy leather respectively |
| B. | Heavy & light leather respectively |
| C. | Both light & heavy leather |
| D. | Neither light nor heavy leather |
| Answer» B. Heavy & light leather respectively | |
| 470. |
Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction ? |
| A. | Oxidation of Na+ ions |
| B. | Oxidation of Cl- ions |
| C. | Reduction of Na+ ions |
| D. | Reduction of Cl- ions |
| Answer» C. Reduction of Na+ ions | |
| 471. |
Chloramines are used in water treatment for_____________________? |
| A. | Disinfection and control of taste & odour |
| B. | Corrosion control |
| C. | Removing turbidity |
| D. | Control of bacteria |
| Answer» B. Corrosion control | |
| 472. |
Chloral is used in the manufacture of__________________? |
| A. | DDT |
| B. | BHC |
| C. | Parathion |
| D. | None of these |
| Answer» B. BHC | |
| 473. |
Chemical name of Grignard reagent is__________________? |
| A. | Sodium thiosulphate |
| B. | Ethyl magnesium chloride |
| C. | Sodium sulphite |
| D. | Sodium bicarbonate |
| Answer» C. Sodium sulphite | |
| 474. |
Chemical name of ‘alum’ is__________________? |
| A. | Barium sulphate |
| B. | Aluminium sulphate |
| C. | Aluminium chloride |
| D. | Calcium sulphate |
| Answer» C. Aluminium chloride | |
| 475. |
Chemical formula of ‘salt cake’ is____________________? |
| A. | Na2SO4 |
| B. | CaSO4 |
| C. | MgSO4 |
| D. | BaSO4 |
| Answer» B. CaSO4 | |
| 476. |
Chemical formula of oleum is_________________? |
| A. | H2SO3 |
| B. | H2SO4 |
| C. | H2S2O7 |
| D. | H2SO7 |
| Answer» D. H2SO7 | |
| 477. |
Chemical formula of BHC, which is an insecticide is__________________? |
| A. | C6H6Cl6 |
| B. | C6Cl6 |
| C. | C6H5Cl |
| D. | C6H4Cl2 |
| Answer» C. C6H5Cl | |
| 478. |
Chalcopyrite is the main ore of_________________? |
| A. | Copper |
| B. | Lead |
| C. | Tin |
| D. | Iron |
| Answer» B. Lead | |
| 479. |
Cement setting under water employs a/an _______________ process ? |
| A. | Hydration |
| B. | Decomposition |
| C. | Oxidation |
| D. | Reduction |
| Answer» B. Decomposition | |
| 480. |
Cement mainly contains_________________? |
| A. | CaO, SiO2, Al2O3 |
| B. | MgO, SiO2, K2O |
| C. | Al2O3, MgO, Fe2O3 |
| D. | CaO, MgO, K2O |
| Answer» B. MgO, SiO2, K2O | |
| 481. |
Cellulose percentage in bamboo fibre is about_________________? |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 482. |
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is ______________ percent? |
| A. | 10 |
| B. | 50 |
| C. | 80 |
| D. | 95 |
| Answer» C. 80 | |
| 483. |
Celluloid is chemically___________________? |
| A. | Cellulose acetate |
| B. | Regenerated cellulose |
| C. | Cellulose nitrate |
| D. | Cellulose acetate butyrate |
| Answer» D. Cellulose acetate butyrate | |
| 484. |
Cation exchanger is regenerated usually with_________________________? |
| A. | NaOH |
| B. | H2SO4 |
| C. | Hydrazine |
| D. | Alum solution |
| Answer» C. Hydrazine | |
| 485. |
Catalytic oxidation of toluene produces____________________? |
| A. | Styrene |
| B. | Phenol |
| C. | Benzene |
| D. | Tri-nitro-toluene |
| Answer» C. Benzene | |
| 486. |
Catalytic oxidation of naphthalene produces ? |
| A. | Styrene |
| B. | Phenol |
| C. | Phthalic anhydride |
| D. | None of these |
| Answer» D. None of these | |
| 487. |
Catalytic oxidation-dehydrogenation of methyl alcohol produces__________________? |
| A. | Formaldehyde |
| B. | Phenol |
| C. | Acetone |
| D. | Maleic anhydride |
| Answer» B. Phenol | |
| 488. |
Catalytic oxidation of naphthalene produces_______________? |
| A. | Styrene |
| B. | Phenol |
| C. | Phthalic anhydride |
| D. | None of these |
| Answer» D. None of these | |
| 489. |
Catalyst used in the oxidation of benzene to produce Maleic anhydride is ______________________? |
| A. | V2O5 |
| B. | Pt |
| C. | Ni |
| D. | Cr |
| Answer» B. Pt | |
| 490. |
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively ? |
| A. | V2O5 & Cr2O3. |
| B. | Oxides of nitrogen & Cr2O3 |
| C. | V2O5 on a porous carrier & oxides of nitrogen |
| D. | Oxides of nitrogen & V2O5 on a porous carrier |
| Answer» E. | |
| 491. |
Catalyst used in the hydrogenation of oil is_________________? |
| A. | Nickel |
| B. | Platinum |
| C. | Iron |
| D. | Alumina |
| Answer» B. Platinum | |
| 492. |
Catalyst used during the manufacture of ‘Vanaspati Ghee’ is ___________________? |
| A. | Zinc |
| B. | Nickel |
| C. | Platinum |
| D. | Copper |
| Answer» C. Platinum | |
| 493. |
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an___________________? |
| A. | Surfactant |
| B. | Builder |
| C. | Optical brightening agent |
| D. | Anti soil redeposition agent |
| Answer» E. | |
| 494. |
Carboxymethyl cellulose (CMC) is added in detergents to_________________? |
| A. | Prevent redeposition of soil on cleaned surface |
| B. | Act as optical brightening agent |
| C. | Inhibit corrosion in washing machines made of aluminium |
| D. | None of these |
| Answer» B. Act as optical brightening agent | |
| 495. |
Carborundum consists mainly of_________________? |
| A. | Bauxite |
| B. | Silicon carbide |
| C. | Boron carbide |
| D. | Calcium carbide |
| Answer» C. Boron carbide | |
| 496. |
Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of____________________? |
| A. | Trichloroethylene |
| B. | Perchloroethylene |
| C. | Parathion |
| D. | Methanol |
| Answer» C. Parathion | |
| 497. |
Carbon disulphide is mainly used in the production of______________________? |
| A. | Viscose rayon |
| B. | Corundum |
| C. | Plasticiser for unsaturated polyester |
| D. | Paints |
| Answer» B. Corundum | |
| 498. |
Carbon content of pitch (residue of coal tar distillation) is around ________________ percent? |
| A. | 70 |
| B. | 55 |
| C. | 80 |
| D. | 94 |
| Answer» E. | |
| 499. |
Caprolactam (a raw material for nylon-6 manufacture) is produced from ___________________? |
| A. | Phenol |
| B. | Naphthalene |
| C. | Benzene |
| D. | Pyridine |
| Answer» D. Pyridine | |
| 500. |
Ca(OH)2 is called __________________? |
| A. | Quicklime |
| B. | Slaked lime |
| C. | Limestone |
| D. | Gypsum |
| Answer» C. Limestone | |