MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Acetone is produced by catalytic dehydrogenation of |
| A. | phenol |
| B. | naphthalene |
| C. | isopropanol |
| D. | ethyl benzene |
| Answer» D. ethyl benzene | |
| 2. |
Commercial production of Vanaspati is done by __________ of edible vegetable oils. |
| A. | hydrogenation |
| B. | oxidation |
| C. | hydrolysis |
| D. | hydrocracking |
| Answer» B. oxidation | |
| 3. |
The difference between saponification value and acid value is |
| A. | called ester value. |
| B. | always negative. |
| C. | constant for all fatty oils. |
| D. | none of these. |
| Answer» B. always negative. | |
| 4. |
Molasses is the starting material for the production of |
| A. | alcohol |
| B. | essential oil |
| C. | fatty acids |
| D. | massecuite |
| Answer» B. essential oil | |
| 5. |
__________ is produced using polycondensation reaction. |
| A. | Polythene |
| B. | Phenol formaldehyde |
| C. | Poly vinyl chloride |
| D. | none of these |
| Answer» C. Poly vinyl chloride | |
| 6. |
Salt is the basic raw material for the manufacture of |
| A. | cement |
| B. | glass |
| C. | potteries |
| D. | caustic soda |
| Answer» E. | |
| 7. |
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. | |
| 8. |
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass. |
| A. | lead |
| B. | borosilicate |
| C. | soda lime |
| D. | alkali silicate |
| Answer» C. soda lime | |
| 9. |
Which one of the following is not an elastomer ? |
| A. | Polyisoperene |
| B. | Neoprene |
| C. | Nitrile-butadiene |
| D. | None of these |
| Answer» E. | |
| 10. |
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by |
| A. | electrolysis |
| B. | electrolytic reduction |
| C. | electrolytic oxidation |
| D. | none of these |
| Answer» C. electrolytic oxidation | |
| 11. |
Heating of __________ to 120°C, produces plaster of paris. |
| A. | blue vitriol |
| B. | gypsum |
| C. | calcium silicate |
| D. | calcium sulphate |
| Answer» C. calcium silicate | |
| 12. |
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. | |
| 13. |
Which of the following is not a raw material used for the manufacture of ordinary glass? |
| A. | Iron oxide |
| B. | Soda ash |
| C. | Limestone |
| D. | Silica |
| Answer» B. Soda ash | |
| 14. |
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda? |
| A. | High cost of mercury. |
| B. | High specific gravity of mercury. |
| C. | Non-availability of high purity mercury. |
| D. | Pollution of water stream by mercury. |
| Answer» E. | |
| 15. |
Nitrogen is an essential component of |
| A. | mineral salts |
| B. | carbohydrates |
| C. | fats |
| D. | proteins |
| Answer» E. | |
| 16. |
Polyvinyl chloride (PVC) is |
| A. | a thermosetting material. |
| B. | a condensation polymerisation product. |
| C. | made by employing emulsion polymerisation. |
| D. | none of these. |
| Answer» D. none of these. | |
| 17. |
Calcination of gypsum produces |
| A. | plaster of paris |
| B. | salt cake |
| C. | nitre cake |
| D. | lime |
| Answer» B. salt cake | |
| 18. |
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used |
| A. | as a lubricant. |
| B. | as a rust preventive. |
| C. | in hard water for cleaning of cloth. |
| D. | as a foam depressant in distillation column. |
| Answer» B. as a rust preventive. | |
| 19. |
Kaoline is a/an |
| A. | refractory material |
| B. | synthetic resin |
| C. | artificial abrasive |
| D. | blue pigment |
| Answer» B. synthetic resin | |
| 20. |
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent. |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» D. 98 | |
| 21. |
In the production of soda ash by Solvay process, the by-product is |
| A. | CaCl2 |
| B. | NH4Cl |
| C. | NH3 |
| D. | NaOH |
| Answer» B. NH4Cl | |
| 22. |
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is |
| A. | alumina |
| B. | silica gel |
| C. | platinum |
| D. | nickel |
| Answer» B. silica gel | |
| 23. |
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ? |
| A. | Cl2 & Na |
| B. | Cl2 & H2 |
| C. | O2 & H2 |
| D. | Cl2, H2 & NaOH solution. |
| Answer» E. | |
| 24. |
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is |
| A. | dilute H2SO4 |
| B. | oleum |
| C. | ultraviolet light |
| D. | none of these |
| Answer» C. ultraviolet light | |
| 25. |
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. | |
| 26. |
Grignard reagent is chemically known as |
| A. | ethyl magnesium chloride. |
| B. | methyl magnesium chloride. |
| C. | dichlorophenol. |
| D. | monochloro acetic acid. |
| Answer» B. methyl magnesium chloride. | |
| 27. |
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 | |
| 28. |
Fat dispersed in water is exemplified by |
| A. | colloids |
| B. | gel |
| C. | butter |
| D. | emulsion |
| Answer» D. emulsion | |
| 29. |
Producer gas consists mainly of |
| A. | CO, CO2 N2, H2 |
| B. | CO, H2 |
| C. | H2, CH4 |
| D. | C2H2, CO2, H2 |
| Answer» B. CO, H2 | |
| 30. |
Phosphate rock is a raw material for the manufacture of |
| A. | phosphoric acid |
| B. | phosphorous |
| C. | superphosphates |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 31. |
Which of the following is the main constituent of the mother liquor produced in salt industry ? |
| A. | Quick lime |
| B. | Glauber's salt |
| C. | Salt petre |
| D. | Bromine |
| Answer» E. | |
| 32. |
Black liquor is converted into white liquor by |
| A. | evaporation and burning the concentrate followed by causticisation of products. |
| B. | multi-effect evaporation only. |
| C. | selective liquid extraction. |
| D. | extractive distillation. |
| Answer» B. multi-effect evaporation only. | |
| 33. |
Poly Vinyl Chloride (P.V.C.) is a __________ material. |
| A. | thermosetting |
| B. | thermoplastic |
| C. | fibrous |
| D. | chemically active |
| Answer» C. fibrous | |
| 34. |
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 | |
| 35. |
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. | |
| 36. |
Essential oils are usually obtained using |
| A. | steam distillation |
| B. | extractive distillation |
| C. | solvent extraction |
| D. | leaching |
| Answer» E. | |
| 37. |
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to |
| A. | reduce its viscosity. |
| B. | increase its viscosity. |
| C. | reduce the variation in its viscosity with temperature. |
| D. | increase the variation in its viscosity with temperature. |
| Answer» D. increase the variation in its viscosity with temperature. | |
| 38. |
Neon gas is |
| A. | flammable in nature. |
| B. | used in color discharge tube. |
| C. | filled in lamps having tungsten filament. |
| D. | all (a), (b) and (c). |
| Answer» C. filled in lamps having tungsten filament. | |
| 39. |
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 | |
| 40. |
__________ acid is an unsaturated fatty acid. |
| A. | Palmitic |
| B. | Oleic |
| C. | Stearic |
| D. | Oxalic |
| Answer» C. Stearic | |
| 41. |
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. | |
| 42. |
Chemical formula of BHC, which is an insecticide is |
| A. | C6H6Cl6 |
| B. | C6Cl6 |
| C. | C6H5Cl |
| D. | C6H4Cl2 |
| Answer» C. C6H5Cl | |
| 43. |
Multistage catalytic converter is not used in the |
| A. | conversion of SO2 to SO3 |
| B. | NH3 synthesis reaction. |
| C. | both (a) & (b). |
| D. | neither (a) nor (b). |
| Answer» C. both (a) & (b). | |
| 44. |
Dacron is a |
| A. | condensation product of hexam-ethylene diamine and adipic acid. |
| B. | thermosetting material. |
| C. | condensation product of dimethyl terephthalate and ethylene glycol. |
| D. | none of these. |
| Answer» E. | |
| 45. |
Neoprene is the trade name of |
| A. | polyurathane |
| B. | phenol formaldehyde |
| C. | polychloroprene |
| D. | styrene-butadiene rubber |
| Answer» D. styrene-butadiene rubber | |
| 46. |
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. | |
| 47. |
Which of the following is an organo-metal-lic compound ? |
| A. | Isopropyl alcohol |
| B. | Tetra-ethyl lead |
| C. | Zeolite |
| D. | Cumene |
| Answer» C. Zeolite | |
| 48. |
The combustion reaction, C + O2 = CO2, is |
| A. | exothermic |
| B. | endothermic |
| C. | autocatalytic |
| D. | none of these |
| Answer» B. endothermic | |
| 49. |
Very fine suspended and colloidal impurities are removed from water by a process called |
| A. | sedimentation |
| B. | coagulation |
| C. | disinfection |
| D. | softening |
| Answer» C. disinfection | |
| 50. |
Main use of liquid nitrogen is in |
| A. | rocket propulsion. |
| B. | making gun powder. |
| C. | detergent manufacture. |
| D. | refrigerative cooling. |
| Answer» E. | |