MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3551. |
A unit operation is exemplified by the process of |
| A. | reduction |
| B. | desorption |
| C. | nitration |
| D. | combustion |
| Answer» C. nitration | |
| 3552. |
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 | |
| 3553. |
Margarine is a/an |
| A. | fat |
| B. | explosive |
| C. | plasticiser |
| D. | rocket propellant |
| Answer» B. explosive | |
| 3554. |
Oils and fats are converted to soap in a process called |
| A. | hydrogenation |
| B. | esterification |
| C. | saponification |
| D. | none of these |
| Answer» D. none of these | |
| 3555. |
Glycerine can be obtained from |
| A. | fat |
| B. | naphthalene |
| C. | cumene |
| D. | sucrose |
| Answer» B. naphthalene | |
| 3556. |
Which of the following, when pyrolysed, produces perchloro-ethylene ? |
| A. | Ethylene dichloride |
| B. | Chlorobenzene |
| C. | Carbon tetrachloride |
| D. | Chlorinated paraffin |
| Answer» D. Chlorinated paraffin | |
| 3557. |
Chemical name of aspirin (an analgesic drug) is |
| A. | acetylsalicylic acid |
| B. | nictonic acid |
| C. | calcium acetate |
| D. | methyl salicylate |
| Answer» B. nictonic acid | |
| 3558. |
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. | |
| 3559. |
Pure rectified spirit contains about __________ percent alcohol. |
| A. | 45 |
| B. | 70 |
| C. | 95 |
| D. | 99.5 |
| Answer» D. 99.5 | |
| 3560. |
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ C. |
| A. | -83 |
| B. | -183 |
| C. | -196 |
| D. | -218 |
| Answer» C. -196 | |
| 3561. |
Rotary kiln is not involved in the production of |
| A. | cement |
| B. | lime from limestone |
| C. | slaked lime from quick lime |
| D. | none of these |
| Answer» D. none of these | |
| 3562. |
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ C. |
| A. | 25 |
| B. | 60-70 |
| C. | 150-200 |
| D. | 250-300 |
| Answer» C. 150-200 | |
| 3563. |
Vanillin is a type of |
| A. | anti-pyretic drug |
| B. | food preservative |
| C. | flavour |
| D. | dye |
| Answer» D. dye | |
| 3564. |
Temporary hardness of water can be removed by |
| A. | addition of alum (a coagulant). |
| B. | boiling. |
| C. | filtration (through gravity sand filter). |
| D. | addition of lime. |
| Answer» C. filtration (through gravity sand filter). | |
| 3565. |
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to |
| A. | brighten the faint images. |
| B. | remove metallic silver. |
| C. | convert silver chloride to silver. |
| D. | remove unexposed silver halide. |
| Answer» E. | |
| 3566. |
High temperature carbonisation of coal takes place at __________ C. |
| A. | 2000 |
| B. | 700 |
| C. | 1100 |
| D. | < 500 |
| Answer» D. < 500 | |
| 3567. |
Carbon disulphide is mainly used in the production of |
| A. | viscose rayon. |
| B. | corundum. |
| C. | plasticiser for unsaturated polyester. |
| D. | paints. |
| Answer» B. corundum. | |
| 3568. |
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. | |
| 3569. |
Nylon-6 is manufactured from |
| A. | caprolactum. |
| B. | hexamethylene diamine and adipic acid. |
| C. | hexamethylene diamine and maleic anhydride. |
| D. | hexamethylene diamine and sebacic acid. |
| Answer» B. hexamethylene diamine and adipic acid. | |
| 3570. |
Sizing material is incorporated in paper to |
| A. | impart resistance to penetration by liquids. |
| B. | increase its thickness. |
| C. | increase its flexibility & opacity. |
| D. | increase its brightness. |
| Answer» B. increase its thickness. | |
| 3571. |
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. | |
| 3572. |
Catalyst used during the manufacture of 'Vanaspati Ghee' is |
| A. | zinc |
| B. | nickel |
| C. | platinum |
| D. | copper |
| Answer» C. platinum | |
| 3573. |
Iron ore hametite is concentrated using |
| A. | electro magnetic separation mainly. |
| B. | gravity separation. |
| C. | froth floatation. |
| D. | roasting. |
| Answer» C. froth floatation. | |
| 3574. |
Refractory bricks burnt at very high temperature have got |
| A. | greater resistance to corrosion by slags. |
| B. | less resistance to corrosion by slags. |
| C. | high spalling tendency. |
| D. | none of these. |
| Answer» B. less resistance to corrosion by slags. | |
| 3575. |
Nitrile rubber is produced by the polymerisation of |
| A. | acrylonitrile and butadiene. |
| B. | acrylonitrile and styrene. |
| C. | isobutylene and isoprene. |
| D. | none of these. |
| Answer» B. acrylonitrile and styrene. | |
| 3576. |
Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of |
| A. | trichloroethylene |
| B. | perchloroethylene |
| C. | parathion |
| D. | methanol |
| Answer» C. parathion | |
| 3577. |
Salt is added in the kettle during soap manufacture to separate |
| A. | soap from lye. |
| B. | glycerine from lye. |
| C. | the metallic soap. |
| D. | the unsaponified fat from soap. |
| Answer» B. glycerine from lye. | |
| 3578. |
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. | |
| 3579. |
Teflon is |
| A. | phenol formaldehyde. |
| B. | an inorganic polymer. |
| C. | poly tetrafluoroethylene (P.T.F.E.). |
| D. | a monomer. |
| Answer» D. a monomer. | |
| 3580. |
Celluloid is chemically |
| A. | cellulose acetate |
| B. | regenerated cellulose |
| C. | cellulose nitrate |
| D. | cellulose acetate butyrate |
| Answer» D. cellulose acetate butyrate | |
| 3581. |
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 | |
| 3582. |
Which of the following is an explosive ? |
| A. | Nitroglycerene |
| B. | Trintrotoluene (TNT) |
| C. | Cellulose nitrate |
| D. | All (a), (b), and (c) |
| Answer» E. | |
| 3583. |
Zeolite is used in the |
| A. | water treatment. |
| B. | glass manufacture. |
| C. | hydrogenation of fatty oil as a catalyst. |
| D. | development of exposed photographic plate. |
| Answer» B. glass manufacture. | |
| 3584. |
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. | |
| 3585. |
Commercial production of Vanaspati is done by __________ of edible vegetable oils. |
| A. | hydrogenation |
| B. | oxidation |
| C. | hydrolysis |
| D. | hydrocracking |
| Answer» B. oxidation | |
| 3586. |
Phenolic antiseptics are added in the __________ soap. |
| A. | shaving |
| B. | medicated |
| C. | metallic |
| D. | transparent |
| Answer» C. metallic | |
| 3587. |
Solvay process is used for the manufacture of |
| A. | caustic soda |
| B. | soda ash |
| C. | caustic potash |
| D. | soda lime |
| Answer» C. caustic potash | |
| 3588. |
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 | |
| 3589. |
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 | |
| 3590. |
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ? |
| A. | Depithing |
| B. | Digestion |
| C. | Bleaching |
| D. | None of these |
| Answer» B. Digestion | |
| 3591. |
Percentage of glycerene present in the spent lye obtained during soap manufacture is about |
| A. | 0.5 |
| B. | 5 |
| C. | 20 |
| D. | 35 |
| Answer» C. 20 | |
| 3592. |
CaSO4 .H2O is known as |
| A. | blue vitriol |
| B. | plaster of Paris |
| C. | gypsum |
| D. | zeolite |
| Answer» C. gypsum | |
| 3593. |
__________ of quicklime produces slaked lime. |
| A. | Hydration |
| B. | Dehydration |
| C. | Hydrogenation |
| D. | none of these |
| Answer» B. Dehydration | |
| 3594. |
Fourdrinier machine is used in the manufacture of |
| A. | nylon-6 |
| B. | paper |
| C. | antibiotics |
| D. | sugar |
| Answer» C. antibiotics | |
| 3595. |
Litharge is |
| A. | lead oxide |
| B. | zinc oxide |
| C. | zinc sulphide |
| D. | cellulosic photographic material |
| Answer» B. zinc oxide | |
| 3596. |
Coagulant is used __________ filtration. |
| A. | before |
| B. | after |
| C. | during |
| D. | to avoid |
| Answer» B. after | |
| 3597. |
Use of chlorine in the treatment of sewage |
| A. | helps in grease separation. |
| B. | increases the biological oxygen demand(BOD). |
| C. | causes bulking of activated sludge. |
| D. | aids in flocculation. |
| Answer» B. increases the biological oxygen demand(BOD). | |
| 3598. |
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil. |
| A. | emulsification |
| B. | dispersion |
| C. | precipitation |
| D. | wetting |
| Answer» D. wetting | |
| 3599. |
Presence of sodium tripolyphosphate (an additive) in synthetic detergent |
| A. | facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions). |
| B. | inhibits its corrosive effects. |
| C. | does not allow redeposition of dirt on the cleaned surface. |
| D. | none of these. |
| Answer» B. inhibits its corrosive effects. | |
| 3600. |
Addition of calcium oxide to water produces |
| A. | exothermic heat |
| B. | hissing sound |
| C. | slaked lime |
| D. | all (a), (b) & (c) |
| Answer» E. | |