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.
| 401. |
Fermentation is adversely affected by the____________________? |
| A. | Presence of air |
| B. | Absence of air |
| C. | High concentration |
| D. | Presence of ammonium salts |
| Answer» D. Presence of ammonium salts | |
| 402. |
Favourable conditions for the liquefaction of gases in general are _____________________? |
| A. | High pressure & low temperature |
| B. | Low pressure & high temperature |
| C. | High pressure & high temperature |
| D. | Low pressure & low temperature |
| Answer» B. Low pressure & high temperature | |
| 403. |
Fatty material used in soap making is _______________________? |
| A. | Fatty acid |
| B. | Fatty alcohols |
| C. | Tallow |
| D. | Detergents |
| Answer» D. Detergents | |
| 404. |
Fats as compared to oils have ___________________? |
| A. | More unsaturated glycerides of fatty acids |
| B. | Less unsaturated glycerides of fatty acids |
| C. | Much higher reactivity to oxygen |
| D. | Lower melting point |
| Answer» C. Much higher reactivity to oxygen | |
| 405. |
Fat splitting catalyst is__________________? |
| A. | CaCO3 |
| B. | ZnO |
| C. | Al2O3 |
| D. | Fe |
| Answer» C. Al2O3 | |
| 406. |
Fat dispersed in water is exemplified by__________________? |
| A. | Colloids |
| B. | Gel |
| C. | Butter |
| D. | Emulsion |
| Answer» D. Emulsion | |
| 407. |
Extraction of _________________ employs an electrolytic process ? |
| A. | Aluminium |
| B. | Silver |
| C. | Copper |
| D. | All A, B. and C |
| Answer» B. Silver | |
| 408. |
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an? |
| A. | Explosive |
| B. | Soap |
| C. | Detergent |
| D. | Analgesic drug |
| Answer» D. Analgesic drug | |
| 409. |
Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at _____________ °C ? |
| A. | 15-30 |
| B. | 90-100 |
| C. | 250-300 |
| D. | < 0 |
| Answer» B. 90-100 | |
| 410. |
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at __________________? |
| A. | 1 atm & 100°C |
| B. | 5 atm & 275°C |
| C. | 100 atm & 500°C |
| D. | 50 atm & 1000°C |
| Answer» C. 100 atm & 500°C | |
| 411. |
Ethyl alcohol cannot be produced_________________? |
| A. | From waste sulphite substrate of paper mills |
| B. | By Esterification and hydrolysis of ethylene |
| C. | From molasses |
| D. | None of these |
| Answer» E. | |
| 412. |
Ethanol amine is produced using ammonia and_________________? |
| A. | Ethyl benzene |
| B. | Ethylene oxide |
| C. | Ethanol |
| D. | Ethane |
| Answer» C. Ethanol | |
| 413. |
Esterification reaction___________________? |
| A. | Produces soap |
| B. | Is reversible |
| C. | Is a reaction between an alcohol and an organic acid |
| D. | All A, B. and C. |
| Answer» E. | |
| 414. |
Esterification reaction produces _________________? |
| A. | Detergent |
| B. | Vanaspati |
| C. | Soap |
| D. | Mercaptans |
| Answer» D. Mercaptans | |
| 415. |
Essential oils are usually obtained using__________________? |
| A. | Steam distillation |
| B. | Extractive distillation |
| C. | Solvent extraction |
| D. | Leaching |
| Answer» E. | |
| 416. |
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 | |
| 417. |
Enzymes are_________________? |
| A. | Proteins with high molecular weight (around 10,000) |
| B. | Derived from living organisms |
| C. | Catalyst for temperature sensitive reactions |
| D. | All A, B. and C. |
| Answer» E. | |
| 418. |
Enzymes are organic catalysts used in the ____________________ reactions ? |
| A. | Chemical |
| B. | Biochemical |
| C. | Photochemical |
| D. | Electrochemical |
| Answer» C. Photochemical | |
| 419. |
Enamels______________________? |
| A. | Give good glossy finish |
| B. | Are same as varnish |
| C. | Are prepared from non-drying oil |
| D. | Do not contain pigment |
| Answer» B. Are same as varnish | |
| 420. |
Electro deposition of metals i.e. electroplating is never done on_____________________? |
| A. | Metals |
| B. | Alloys |
| C. | Refractories |
| D. | Non-metals |
| Answer» D. Non-metals | |
| 421. |
Electric bulbs are made of _______________ glass ? |
| A. | Jena |
| B. | Flint |
| C. | Crookes |
| D. | Pyrex |
| Answer» C. Crookes | |
| 422. |
Economics of ‘Solvay Process’ depends upon the efficiency of __________________? |
| A. | Carbonating tower |
| B. | Ammonia recovery |
| C. | Ammonia recovery and size of the plant |
| D. | Ammoniation of salt solution |
| Answer» D. Ammoniation of salt solution | |
| 423. |
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 | |
| 424. |
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 | |
| 425. |
Dry ice (solidified CO2) is used for the___________________? |
| A. | Storage & shipment of frozen foods and ice-creams |
| B. | Liquefaction of permanent gases |
| C. | Liquefaction of natural gas |
| D. | None of these |
| Answer» B. Liquefaction of permanent gases | |
| 426. |
Drinking (potable) water treatment does not involve __________________? |
| A. | Coagulation |
| B. | Sedimentation |
| C. | Softening |
| D. | Disinfection |
| Answer» D. Disinfection | |
| 427. |
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________? |
| A. | Nitric acid |
| B. | Sulphuric acid |
| C. | Ammonium sulphate |
| D. | Hydrochloric acid |
| Answer» C. Ammonium sulphate | |
| 428. |
Digestion of wood-base materials (for manufacture of pulp) is done to __________________? |
| A. | Remove lignin |
| B. | Produce long fibres |
| C. | Prevent deterioration on storage |
| D. | None of these |
| Answer» B. Produce long fibres | |
| 429. |
Dichloro diphenyl ________________ is the full form of DDT (an insecticide) ? |
| A. | Tetrachloroethane |
| B. | Trichloroethane |
| C. | Tetrachloromethane |
| D. | Trichloromethane |
| Answer» C. Tetrachloromethane | |
| 430. |
Diaphragm electrolytic cell as compared to mercury electrolytic cell_____________________? |
| A. | Produces 70% NaOH solution |
| B. | Requires less specific power consumption for the production of chlorine |
| C. | Requires lesser investment for similar capacity |
| D. | All A , B. and C |
| Answer» D. All A , B. and C | |
| 431. |
Detergent is produced by the sulphonation of dodecyl benzene, which is an ________________ reaction? |
| A. | Endothermic |
| B. | Exothermic |
| C. | Irreversible |
| D. | Both B. and C. |
| Answer» E. | |
| 432. |
Dense soda ash used in the manufacture of glass, is chemically represented by__________________? |
| A. | Na2CO3 |
| B. | Na2CO3.10H2O |
| C. | Na2CO3.H2O |
| D. | Na2HCO3 |
| Answer» D. Na2HCO3 | |
| 433. |
Dehydrogenation of Isopropanol produces ____________________? |
| A. | Propyl alcohol |
| B. | Acetone |
| C. | Trichloroethylene |
| D. | Formaldehyde |
| Answer» C. Trichloroethylene | |
| 434. |
Dehydrogenation of ethyl benzene produces __________________ ? |
| A. | Styrene |
| B. | Naphthalene |
| C. | Phenol |
| D. | Benzoic acid |
| Answer» B. Naphthalene | |
| 435. |
Dechlorination of treated water is necessary to __________________? |
| A. | Remove residual turbidity |
| B. | Reduce the bacterial load on filter |
| C. | Control taste and odour |
| D. | Remove chlorinous taste |
| Answer» E. | |
| 436. |
Deaeration of water in its treatment is necessary, as it___________________? |
| A. | Minimises its turbidity |
| B. | Helps in controlling its taste and odour |
| C. | Minimises its corrosiveness |
| D. | None of these |
| Answer» D. None of these | |
| 437. |
Deacon’s method is used for the manufacture of____________________? |
| A. | Glauber’s salt |
| B. | Common salt |
| C. | Chlorine |
| D. | Graphite electrode |
| Answer» D. Graphite electrode | |
| 438. |
DDT stands for___________________? |
| A. | Diethyl-diphenyl-trichloromethane |
| B. | Dichloro-diphenyl-trichloromethane |
| C. | diphenyl-dichloro-trichloromethane |
| D. | Dichloro-diphenyl-trichloroethane |
| Answer» E. | |
| 439. |
DDT should not be allowed to come in contact with iron (during its manufacture) to _______________? |
| A. | Avoid its decomposition |
| B. | Prevent sulphonation of the monochlorobenzene by the acid catalyst |
| C. | Achieve non-hygroscopic property |
| D. | None of these |
| Answer» B. Prevent sulphonation of the monochlorobenzene by the acid catalyst | |
| 440. |
Dacron (or Terylene) fibres as compared to nylon fibres have__________________? |
| A. | Better heat & acid resistant properties |
| B. | Poorer resistance to alkalis |
| C. | Poorer dyeability |
| D. | All A , B. and C. |
| Answer» E. | |
| 441. |
Dacron is a/an _________________? |
| A. | Polyester |
| B. | Unsaturated polyester |
| C. | Polyamide |
| D. | Inorganic polymer |
| Answer» B. Unsaturated polyester | |
| 442. |
Dacron is a ___________________? |
| A. | Condensation product of Hexamethylene diamine and adipic acid |
| B. | Thermosetting material |
| C. | Condensation product of dimethyl terephthalate and ethylene glycol |
| D. | None of these |
| Answer» E. | |
| 443. |
Cumene (isopropyl benzene) is made by ____________________? |
| A. | Oxidation of naphthalene |
| B. | Propylene alkylation of benzene |
| C. | Polymerisation of a mixture of benzene & propylene |
| D. | None of these |
| Answer» C. Polymerisation of a mixture of benzene & propylene | |
| 444. |
Cumene is the starting material for the production of________________? |
| A. | Benzoic acid |
| B. | Phenol and acetone |
| C. | Isoprene |
| D. | Styrene |
| Answer» C. Isoprene | |
| 445. |
Cooking liquor in case of sulphite process is _____________________? |
| A. | Sodium sulphite and sodium bisulphite |
| B. | Magnesium sulphite and free SO2 in acid medium |
| C. | Magnesium sulphate and magnesium bicarbonate |
| D. | None of these |
| Answer» B. Magnesium sulphite and free SO2 in acid medium | |
| 446. |
Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent? |
| A. | 80 |
| B. | 90 |
| C. | 98 |
| D. | 100 |
| Answer» D. 100 | |
| 447. |
Conversion of CO to CO2 by steam in presence of a catalyst is called__________________? |
| A. | Steam reforming |
| B. | Shift conversion |
| C. | Steam gasification |
| D. | None of these |
| Answer» C. Steam gasification | |
| 448. |
Contact process of sulphuric acid manufacture ____________________? |
| A. | Yields acid of higher concentration than chamber process |
| B. | Yields acids of lower concentration than chamber process |
| C. | Is obsolete |
| D. | Eliminates absorber |
| Answer» B. Yields acids of lower concentration than chamber process | |
| 449. |
Concentration of sulphide ores is done usually by____________________? |
| A. | Roasting |
| B. | Smelting |
| C. | Froth floatation |
| D. | Electromagnetic separation |
| Answer» D. Electromagnetic separation | |
| 450. |
Concentration of NaOH solution produced by mercury electrolytic cell is about _______________ percent? |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» D. 98 | |