MCQOPTIONS
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MCQOPTIONS
This section includes 565 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
__Pick out the false statement pertaining to water treatment.__ |
| A. | Aeration of water is effective in CO‚ÇÇ removal |
| B. | The zeolite water softening process reduces the hardness of water by not more than 50% |
| C. | Sodium sulphate or sodium carbonate do not cause hardness in water |
| D. | Water with pH value less than 7, is acidic |
| Answer» C. Sodium sulphate or sodium carbonate do not cause hardness in water | |
| 352. |
__Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.__ |
| A. | -53 |
| B. | -103 |
| C. | -183 |
| D. | -196 |
| Answer» D. -196 | |
| 353. |
_In Kraft process of paper manufacture, white cooking liquor consists of caustic soda$? |
| A. | Sodium sulphide & sodium carbonate |
| B. | Sodium sulphite & sodium carbonate |
| C. | Sodium sulphite & sodium sulphide |
| D. | None of these |
| Answer» B. Sodium sulphite & sodium carbonate | |
| 354. |
_Insulin is an __________ drug.$? |
| A. | Anti-malarial |
| B. | Anti-TB |
| C. | Antibiotic |
| D. | None of these |
| Answer» E. | |
| 355. |
_The terminology 'BTX' used in coal tar distillation industry refers to$? |
| A. | Benzol-toluol-xylol |
| B. | Benzol-toluene-xylene |
| C. | Benzene-toluol-xylol |
| D. | Benzene-toluene-xylene |
| Answer» E. | |
| 356. |
_White phosphorous is stored under water, because$? |
| A. | It does not react with water |
| B. | It is poisonous |
| C. | Its kindling temperature in dry air is very low |
| D. | It is unstable |
| Answer» D. It is unstable | |
| 357. |
_The amount of benzene present in pure benzol is about __________ percent.$? |
| A. | 30 |
| B. | 50 |
| C. | 70 |
| D. | 90 |
| Answer» D. 90 | |
| 358. |
_Kaoline is a/an$? |
| A. | Refractory material |
| B. | Synthetic resin |
| C. | Artificial abrasive |
| D. | Blue pigment |
| Answer» B. Synthetic resin | |
| 359. |
_Portland cement consists mainly of$? |
| A. | CaO & SiO‚ÇÇ |
| B. | SiO‚ÇÇ & Al2O‚ÇÉ |
| C. | CaO & Al2O‚ÇÉ |
| D. | CaO & FE‚ÇÇO‚ÇÉ |
| Answer» B. SiO‚Äö√á√á & Al2O‚Äö√á√â | |
| 360. |
_Bleaching of paper pulp is done with$? |
| A. | Activated clay |
| B. | Bromine |
| C. | Chlorine or chlorine dioxide |
| D. | Magnesium sulphite |
| Answer» D. Magnesium sulphite | |
| 361. |
_H‚ÇÇS is scrubbed from refinery gases by absorption using$? |
| A. | Dilute H‚ÇÇSO‚ÇÑ |
| B. | Ethanol amine |
| C. | Chilled water |
| D. | Tri-butyl phosphate |
| Answer» C. Chilled water | |
| 362. |
_Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?$? |
| A. | Xanthates |
| B. | Stearic acid |
| C. | Calcium & aluminium stearate |
| D. | Formic acid |
| Answer» D. Formic acid | |
| 363. |
_Which of the following has sodium bicarbonate as its main constituent ?$? |
| A. | Baking soda |
| B. | Baking powder |
| C. | Washing soda |
| D. | None of these |
| Answer» C. Washing soda | |
| 364. |
_How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?$? |
| A. | 500°C |
| B. | 750°C |
| C. | 1000°C |
| D. | 1500°C |
| Answer» D. 1500¬¨‚àûC | |
| 365. |
_Nitric acid is not used in the manufacture of$? |
| A. | Detergents |
| B. | Fertilisers |
| C. | Aqua regia |
| D. | Explosives |
| Answer» B. Fertilisers | |
| 366. |
_Main use of liquid nitrogen is in$? |
| A. | Rocket propulsion |
| B. | Making gun powder |
| C. | Detergent manufacture |
| D. | Refrigerative cooling |
| Answer» E. | |
| 367. |
_Saponification value/number of an oil or fat is a measure of its$? |
| A. | Fatty acid content |
| B. | Degree of unsaturation of the fatty acids present in it |
| C. | Average molecular weight |
| D. | Insoluble fatty acid content |
| Answer» D. Insoluble fatty acid content | |
| 368. |
_Unsaturated oils compared to saturated oils have$? |
| A. | Lower melting point & higher reactivity to oxygen |
| B. | Higher melting point & higher reactivity to oxygen |
| C. | Lower melting point & lower reactivity to oxygen |
| D. | Higher melting point & lower reactivity to oxygen |
| Answer» B. Higher melting point & higher reactivity to oxygen | |
| 369. |
_Nylon 6-6 is manufactured from$? |
| A. | Hexamethylene diamine and adipic acid |
| B. | Hexamethylene diamine and maleic anhydride |
| C. | Caprolactum |
| D. | Dimethyl terephthalate and ethylene glycol |
| Answer» B. Hexamethylene diamine and maleic anhydride | |
| 370. |
_'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of$? |
| A. | Final rolling out of paper |
| B. | Cutting of fibres |
| C. | Hydration of fibres |
| D. | Fibrillation of fibre |
| Answer» B. Cutting of fibres | |
| 371. |
_Function of thinner in a paint is to$? |
| A. | Accelerate the oxidation of oil |
| B. | Prevent gelling of the paint |
| C. | Suspend pigments & dissolve film forming materials |
| D. | Form a protective film |
| Answer» D. Form a protective film | |
| 372. |
_Fusel oil is a/an$? |
| A. | Essential oil |
| B. | Extract from medicinal herbs |
| C. | Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses) |
| D. | None of these |
| Answer» D. None of these | |
| 373. |
_Which is the most efficient absorbant for SO‚ÇÉ out of the following?$? |
| A. | 20% oleum |
| B. | 65% oleum |
| C. | 78%H‚ÇÇSO‚ÇÑ |
| D. | 98%H‚ÇÇSO‚ÇÑ |
| Answer» E. | |
| 374. |
_Fat splitting catalyst is$? |
| A. | CaCO‚ÇÉ |
| B. | ZnO |
| C. | Al2O‚ÇÉ |
| D. | Fe |
| Answer» C. Al2O‚Äö√á√â | |
| 375. |
_Which of the following is not required in the manufacture of soda ash by Solvay process?$? |
| A. | Ammonia |
| B. | Limestone |
| C. | Nitric acid |
| D. | None of these |
| Answer» D. None of these | |
| 376. |
_Haemoglobin is a/an$? |
| A. | Amino acid |
| B. | Biological catalyst |
| C. | Protein |
| D. | Enezyme |
| Answer» D. Enezyme | |
| 377. |
_Graphite is a/an$? |
| A. | Electrical insulator |
| B. | Allotrope of carbon |
| C. | Moderator used in nuclear reactor |
| D. | Both B and C |
| Answer» E. | |
| 378. |
_During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to$? |
| A. | Increase the rate of absorption |
| B. | Avoid corrosion |
| C. | Reduce the cooling water circulation rate |
| D. | None of these |
| Answer» C. Reduce the cooling water circulation rate | |
| 379. |
_Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.$? |
| A. | Phthalic anhydride |
| B. | Vinyl chloride |
| C. | Maleic anhydride |
| D. | Dacron |
| Answer» C. Maleic anhydride | |
| 380. |
_Industrial production of chloroform requires acetone and$? |
| A. | Phosgene |
| B. | Calcium hypochlorite |
| C. | Chlorine |
| D. | Ammonium chloride |
| Answer» C. Chlorine | |
| 381. |
_Hydrolysis of sugar is called$? |
| A. | Hydration |
| B. | Inversion |
| C. | Esterification |
| D. | None of these |
| Answer» C. Esterification | |
| 382. |
_Chemical formula of BHC, which is an insecticide is$? |
| A. | C‚ÇÜH‚ÇÜCl‚ÇÜ |
| B. | C‚ÇÜCl‚ÇÜ |
| C. | C‚ÇÜH‚ÇÖCl |
| D. | C‚ÇÜH‚ÇÑCl‚ÇÇ |
| Answer» C. C‚Äö√á√úH‚Äö√á√ñCl | |
| 383. |
_Plasticisers are added to paints to$? |
| A. | Make it corrosion resistant |
| B. | Make glossy surface |
| C. | Give elasticity & prevent cracking of the film |
| D. | Increase atmospheric oxidation |
| Answer» D. Increase atmospheric oxidation | |
| 384. |
_High purity nitrogen is used in$? |
| A. | Making protective gas (95% N‚ÇÇ + 5% H‚ÇÇ) for annealing of cold rolled steel strip coils |
| B. | Fire fighting purposes |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 385. |
_Phenol formaldehyde is produced by condensation polymerisation. It is also known as$? |
| A. | Teflon |
| B. | Bakelite |
| C. | Polyester |
| D. | Nylon-66 |
| Answer» C. Polyester | |
| 386. |
_A bio-catalyst produced by living cells which acts independent of the cell is called a/an$? |
| A. | Substrate |
| B. | Enzyme |
| C. | Nutrient |
| D. | None of these |
| Answer» C. Nutrient | |
| 387. |
_Epoxy resin$? |
| A. | Is a good adhesive |
| B. | Is an elastomer |
| C. | Cannot be used for surface coatings |
| D. | Is a polyester |
| Answer» B. Is an elastomer | |
| 388. |
_Blue colour is imparted to glass by the addition of$? |
| A. | FeSO‚ÇÑ |
| B. | PbO |
| C. | CaO |
| D. | NaOH |
| Answer» D. NaOH | |
| 389. |
_Resistance to fusion of the refractory under a steady rising temperature condition is called$? |
| A. | Spalling |
| B. | Refractoriness |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 390. |
_Salt cake is chemically represented by$? |
| A. | Na‚ÇÇSO‚ÇÑ |
| B. | CaSO‚ÇÑ.1/2 H‚ÇÇO |
| C. | MgSO‚ÇÑ |
| D. | BaSO‚ÇÑ |
| Answer» B. CaSO‚Äö√á√ë.1/2 H‚Äö√á√áO | |
| 391. |
_Styrene (a monomer for the production of polystyrene) is commercially produced by$? |
| A. | Catalytic dehydrogenation of ethyl benzene |
| B. | Dehydration of ethyl alcohol followed by hydrogenation |
| C. | Reacting ethylene oxide with acetal-dehyde |
| D. | Fermentation of starch |
| Answer» B. Dehydration of ethyl alcohol followed by hydrogenation | |
| 392. |
_Use of hydrated lime in water treatment$? |
| A. | Before filtration, reduces the bacterial load on filters |
| B. | After filtration, combats the corrosive-ness of water due to the presence of O‚ÇÇ & CO‚ÇÇ |
| C. | Is to adjust the pH value |
| D. | All of the above |
| Answer» E. | |
| 393. |
_Ore concentration by froth floatation utilises the __________ of ore particles.$? |
| A. | Density difference |
| B. | Wetting characteristics |
| C. | Terminal velocities |
| D. | None of these |
| Answer» C. Terminal velocities | |
| 394. |
_Sulphuric acid saturated with SO‚ÇÉ is called$? |
| A. | Concentrated H‚ÇÇSO‚ÇÑ |
| B. | Sulphurous acid |
| C. | Oleum |
| D. | None of these |
| Answer» D. None of these | |
| 395. |
_Catalytic oxidation of naphthalene produces$? |
| A. | Styrene |
| B. | Phenol |
| C. | Phthalic anhydride |
| D. | None of these |
| Answer» D. None of these | |
| 396. |
_Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on$? |
| A. | Slaked lime |
| B. | Soda lime |
| C. | Calcium perchlorate |
| D. | None of these |
| Answer» B. Soda lime | |
| 397. |
_Rosin soap is added during paper manufacture to$? |
| A. | Impart adhesive properties |
| B. | Improve opacity |
| C. | Impart resistance to penetration by liquids |
| D. | None of these |
| Answer» D. None of these | |
| 398. |
_P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as$? |
| A. | Bakelite |
| B. | Neoprene |
| C. | Teflon |
| D. | Nylon-66 |
| Answer» D. Nylon-66 | |
| 399. |
_Which of the following is not an antibiotic?$? |
| A. | Penicillin |
| B. | Streptomycin |
| C. | Tetracyclin |
| D. | Quinine |
| Answer» E. | |
| 400. |
_Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?$? |
| 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 | |