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.
| 401. |
_Main use of hydrazine is$? |
| A. | As a rocket fuel |
| B. | In water treatment |
| C. | As a disinfectant |
| D. | As fire retardant |
| Answer» B. In water treatment | |
| 402. |
_Cumene is the starting material for the production of$? |
| A. | Benzoic acid |
| B. | Phenol and acetone |
| C. | Isoprene |
| D. | Styrene |
| Answer» C. Isoprene | |
| 403. |
_Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because$? |
| A. | Its calorific value is very less |
| B. | Tar neutralises the residual acids present in pitch |
| C. | It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop |
| D. | All of the above |
| Answer» D. All of the above | |
| 404. |
_Dacron (or terylene) fibres as compared to nylon's fibres have$? |
| A. | Better heat & acid resistant properties |
| B. | Poorer resistance to alkalis |
| C. | Poorer dyeability |
| D. | All of the above |
| Answer» E. | |
| 405. |
_Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of$? |
| A. | Calcium sulphate |
| B. | Sodium chloride |
| C. | Sodium sulphate |
| D. | Magnesium chloride |
| Answer» C. Sodium sulphate | |
| 406. |
_The ideal pulp for the manufacture of paper should have high __________ content.$? |
| A. | Cellulose |
| B. | Lignin |
| C. | Both A & B |
| D. | None of these |
| Answer» B. Lignin | |
| 407. |
_The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.$? |
| A. | Cationic |
| B. | Anionic |
| C. | Amphoteric |
| D. | Semi polar |
| Answer» C. Amphoteric | |
| 408. |
_Ethanol amine is produced using ammonia and$? |
| A. | Ethyl benzene |
| B. | Ethylene oxide |
| C. | Ethanol |
| D. | Ethane |
| Answer» C. Ethanol | |
| 409. |
_Which of the following paper does not require a filler during manufacture?$? |
| A. | Bond paper |
| B. | Writing paper |
| C. | Blotting paper |
| D. | Coloured paper |
| Answer» D. Coloured paper | |
| 410. |
_Poly tetraflouro ethylene (P.T.F.E.) is known as$? |
| A. | Bakelite |
| B. | Teflon |
| C. | Celluloid |
| D. | Decron |
| Answer» C. Celluloid | |
| 411. |
_Thermoplastic materials$? |
| A. | Do not soften on application of heat |
| B. | Are heavily branched molecules |
| C. | Are solvent insoluble |
| D. | None of these |
| Answer» E. | |
| 412. |
_Maleic anhydride is produced by catalytic oxidation of$? |
| A. | Toluene |
| B. | Ethyl alcohol |
| C. | Naphthalene |
| D. | Benzene |
| Answer» E. | |
| 413. |
_Catalyst used in the oxidation of benzene to produce maleic anhydride is$? |
| A. | V‚ÇÇO‚ÇÖ |
| B. | Pt |
| C. | Ni |
| D. | Cr |
| Answer» B. Pt | |
| 414. |
_Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils$? |
| A. | Cause cholesterol build up and blood clotting |
| B. | Are prone to rancid oxidation |
| C. | Always contain some amount of nickel (as their complete removal is very difficult) |
| D. | Have affinity to retain harmful sulphur compounds |
| Answer» B. Are prone to rancid oxidation | |
| 415. |
_Carboxymethyl cellulose (CMC) is added in detergents to$? |
| A. | Prevent redeposition of soil on cleaned surface |
| B. | Act as optical brightening agent |
| C. | Inhibit corrosion in washing machines made of aluminium |
| D. | None of these |
| Answer» B. Act as optical brightening agent | |
| 416. |
_Chemical formula of oleum is$? |
| A. | H‚ÇÇSO‚ÇÉ |
| B. | H‚ÇÇSO‚ÇÑ |
| C. | H‚ÇÇS‚ÇÇO‚Çá |
| D. | H‚ÇÇSO‚Çá |
| Answer» D. H‚Äö√á√áSO‚Äö√á√° | |
| 417. |
_Saponification number of an oil or fat$? |
| A. | Gives an idea about its molecular weight |
| B. | Is inversely proportional to its molecular weight |
| C. | Detects its adulteration |
| D. | All of the above |
| Answer» E. | |
| 418. |
_Calcination of gypsum produces$? |
| A. | Plaster of paris |
| B. | Salt cake |
| C. | Nitre cake |
| D. | Lime |
| Answer» B. Salt cake | |
| 419. |
Low temperature carbonisation of coal takes place at __________ °C.$? |
| A. | 300 |
| B. | 1100 |
| C. | 700 |
| D. | 900 |
| Answer» D. 900 | |
| 420. |
The major constituents of glass are$? |
| A. | Lime, clay and soda ash |
| B. | Sand, lime and soda ash |
| C. | Silica, alumina and clay |
| D. | Silica, alumina and soda ash |
| Answer» C. Silica, alumina and clay | |
| 421. |
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively$? |
| A. | V‚ÇÇO‚ÇÖ & Cr‚ÇÇO‚ÇÉ |
| B. | Oxides of nitrogen & Cr‚ÇÇO‚ÇÉ |
| C. | V‚ÇÇO‚ÇÖ on a porous carrier & oxides of nitrogen |
| D. | Oxides of nitrogen & V‚ÇÇO‚ÇÖ on a porous carrier |
| Answer» E. | |
| 422. |
99.5% purity oxygen is used in$? |
| A. | Cutting and welding by oxy-acetylene flame |
| B. | Hospitals for medicinal purposes |
| C. | Gas masks and artificial breathing apparatus |
| D. | All of the above |
| Answer» E. | |
| 423. |
__________ is an ore of lead.$? |
| A. | Quartz |
| B. | Galena |
| C. | Siderite |
| D. | Chalcopyrite |
| Answer» C. Siderite | |
| 424. |
More than 100 percent of __________ is present in oleum.$? |
| A. | SO‚ÇÉ |
| B. | H‚ÇÇSO‚ÇÑ |
| C. | H‚ÇÇSO‚ÇÉ |
| D. | SO‚ÇÇ |
| Answer» C. H‚Äö√á√áSO‚Äö√á√â | |
| 425. |
Soap cannot be used with hard water, because$? |
| A. | Hard water contains sulphate |
| B. | They form insoluble calcium soaps which precipitate |
| C. | They attract back the removed dirt |
| D. | None of these |
| Answer» C. They attract back the removed dirt | |
| 426. |
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically$? |
| A. | Cyclo trimethylene trinitramine |
| B. | Trinitro resorcinol |
| C. | Cyclo tetramethylene tetranitramine |
| D. | Trinitro benzene |
| Answer» B. Trinitro resorcinol | |
| 427. |
Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.$? |
| A. | Coke and sand |
| B. | Brine and coal |
| C. | Coke and caustic soda |
| D. | None of these |
| Answer» C. Coke and caustic soda | |
| 428. |
Type of glass used in optical work is the __________ glass.$? |
| A. | Soda-lime |
| B. | Fibre |
| C. | Lead |
| D. | Borosilicate |
| Answer» D. Borosilicate | |
| 429. |
Calcination of limestone is not done in a __________ kiln for producing lime.$? |
| A. | Vertical shaft |
| B. | Rotary |
| C. | Fluidised bed |
| D. | Fixed bed |
| Answer» E. | |
| 430. |
Poly Vinyl Chloride (P.V.C.) is a __________ material.$? |
| A. | Thermosetting |
| B. | Thermoplastic |
| C. | Fibrous |
| D. | Chemically active |
| Answer» C. Fibrous | |
| 431. |
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.$? |
| A. | Adsorbs |
| B. | Oxidises |
| C. | Reduces |
| D. | Converts |
| Answer» B. Oxidises | |
| 432. |
Presence of H‚ÇÇS in raw water (to be chlorinated) results in the$? |
| A. | Reduced softening capacity of zeolite |
| B. | Increased dosage of chlorine to provide a disinfecting residual in the water |
| C. | Easy removal of its hardness |
| D. | None of these |
| Answer» C. Easy removal of its hardness | |
| 433. |
Lubricating greases are a mixture of$? |
| A. | Mineral oil, soap and additives |
| B. | Mineral oil and metallic soap |
| C. | Mineral oil and fatty oil |
| D. | Fatty oil and metallic soap |
| Answer» B. Mineral oil and metallic soap | |
| 434. |
__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.$? |
| A. | Solvay |
| B. | Ostwald's |
| C. | Haber's |
| D. | None of these |
| Answer» C. Haber's | |
| 435. |
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$? |
| A. | Sulphuric acid |
| B. | Phosphoric acid |
| C. | Hydrochloric acid |
| D. | Hydroflouric acid |
| Answer» B. Phosphoric acid | |
| 436. |
Antibiotic$? |
| A. | Inhibits/destroys the growth of microorganisms |
| B. | Is used as a pain reliever |
| C. | Is an antimalarial |
| D. | Is an anaesthetic |
| Answer» B. Is used as a pain reliever | |
| 437. |
Impurities present in brine is normally removed by treatment with$? |
| A. | NH‚ÇÉ and CO‚ÇÇ |
| B. | Lime and soda ash |
| C. | Lime, ammonia and carbon |
| D. | All of the above |
| Answer» E. | |
| 438. |
Which is the most suitable dye for synthetic fibres?$? |
| A. | Acid dye |
| B. | Azoic dye |
| C. | Pigment dye |
| D. | Mordant dye |
| Answer» B. Azoic dye | |
| 439. |
BHC (Benzene hexachloride) is made by the chlorination of benzene$? |
| A. | Which is an addition reaction |
| B. | Which is a substitution reaction |
| C. | In absolute dark |
| D. | In presence of sunlight |
| Answer» B. Which is a substitution reaction | |
| 440. |
Catalytic oxidation of toluene produces$? |
| A. | Styrene |
| B. | Phenol |
| C. | Benzene |
| D. | Tri-nitro-toluene |
| Answer» C. Benzene | |
| 441. |
In the manufacture of viscose rayon, the raw material used industrially is$? |
| A. | Recalyptious wood |
| B. | Bamboo |
| C. | Bagasse |
| D. | Fine teak wood |
| Answer» E. | |
| 442. |
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about$? |
| A. | 0.1 to 0.5 |
| B. | 1 to 5 |
| C. | 5 to 10 |
| D. | 15 to 25 |
| Answer» B. 1 to 5 | |
| 443. |
Mannheim furnace is used in the manufacture of$? |
| A. | Hydrochloric acid |
| B. | H‚ÇÇSO‚ÇÑ by Chamber process |
| C. | Calcium carbide |
| D. | Corundum |
| Answer» B. H‚Äö√á√áSO‚Äö√á√ë by Chamber process | |
| 444. |
Sulphur removal by heating of pyrite ore in presence of air is called its$? |
| A. | Reduction |
| B. | Roasting |
| C. | Calcination |
| D. | Smelting |
| Answer» C. Calcination | |
| 445. |
Roasting of metallurgical ores is done mainly to$? |
| A. | Dehydrate it |
| B. | Sinter the ore |
| C. | Remove CO‚ÇÇ & H‚ÇÇO |
| D. | Remove arsenic & sulphur |
| Answer» E. | |
| 446. |
Main constituent of limestone is$? |
| A. | CaCO‚ÇÉ |
| B. | MgCO‚ÇÉ |
| C. | Na‚ÇÇCO‚ÇÉ |
| D. | CaSO‚ÇÑ |
| Answer» B. MgCO‚Äö√á√â | |
| 447. |
Permanent hardness of water can be removed by$? |
| A. | Boiling |
| B. | Adding Ca(OH)‚ÇÇ |
| C. | Boiling it with Na‚ÇÇCO‚ÇÉ |
| D. | None of these |
| Answer» D. None of these | |
| 448. |
Glycerine is a by-product of the __________ industry.$? |
| A. | Soap |
| B. | Detergent |
| C. | Oil hydrogenation |
| D. | Paint |
| Answer» B. Detergent | |
| 449. |
In industrial nomenclature, alcohol means$? |
| A. | Butyl alcohol |
| B. | Propyl alcohol |
| C. | Ethanol |
| D. | Methyl alcohol |
| Answer» D. Methyl alcohol | |
| 450. |
Pig iron is produced by blast furnaces in India using mostly the iron ore named$? |
| A. | Hematite |
| B. | Magnetite |
| C. | Siderite |
| D. | Chalcopyrite |
| Answer» B. Magnetite | |