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. |
Which of the following, when pyrolysed, produces perchloro-ethylene? |
| A. | Ethylene dichloride |
| B. | Chlorobenzene |
| C. | Carbon tetrachloride |
| D. | Chlorinated paraffin |
| Answer» D. Chlorinated paraffin | |
| 2. |
Fusion of limestone and __________ produces high alumina cement. |
| A. | Sand |
| B. | Bauxite |
| C. | Quicklime |
| D. | Calcite |
| Answer» C. Quicklime | |
| 3. |
Fusion of bauxite and __________ produces high alumina cement. |
| A. | Alum |
| B. | Limestone |
| C. | Coke |
| D. | Quartz |
| Answer» C. Coke | |
| 4. |
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 | |
| 5. |
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 | |
| 6. |
Liquor poisoning generally occurs due to the presence of __________ in it. |
| A. | Ethyl alcohol |
| B. | Impurities |
| C. | Methyl alcohol |
| D. | Carbonic acid |
| Answer» D. Carbonic acid | |
| 7. |
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. | |
| 8. |
The catalyst used in shift converter is |
| A. | Nickel |
| B. | Vanadium |
| C. | Silica gel |
| D. | Alumina |
| Answer» B. Vanadium | |
| 9. |
Wet chlorine gas produced during electrolysis of brine is dehydrated by |
| A. | Spraying 66° Be H₂SO₄ counter current to the flow of the gas |
| B. | Passing it through a bed of diatomaceous earth |
| C. | Passing it through a bed of silica gel |
| D. | None of these |
| Answer» B. Passing it through a bed of diatomaceous earth | |
| 10. |
Alkylbenzene sulfonate (ABS) is a |
| A. | Detergent |
| B. | Rubber |
| C. | Pesticide |
| D. | Polyester |
| Answer» B. Rubber | |
| 11. |
Fluorescent dyes are added in detergents to |
| A. | Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics |
| B. | Attain distinctiveness from other brands |
| C. | Act as tarnish inhibitor for metals like German silver |
| D. | None of these |
| Answer» B. Attain distinctiveness from other brands | |
| 12. |
__________ is produced by the dehydrogenation of ethyl benzene. |
| A. | Styrene |
| B. | Ethyl alcohol |
| C. | Cumene |
| D. | Phenol |
| Answer» B. Ethyl alcohol | |
| 13. |
Zeigler process |
| A. | Produces high density polyethylene |
| B. | Produces low density polyethylene |
| C. | Uses no catalyst |
| D. | Employs very high pressure |
| Answer» B. Produces low density polyethylene | |
| 14. |
Highly porous refractory bricks are |
| A. | Less susceptible to chemical attack by molten fluxes and gases etc |
| B. | Very strong |
| C. | Having very high thermal conductivity |
| D. | None of these |
| Answer» E. | |
| 15. |
Acetone is produced by catalytic dehydrogenation of |
| A. | Phenol |
| B. | Naphthalene |
| C. | Isopropanol |
| D. | Ethyl benzene |
| Answer» D. Ethyl benzene | |
| 16. |
Higher vicosity index of a lubricating oil denotes |
| A. | Less changes in fluidity of oil with temperature |
| B. | Substantially high change in fluidity of oil with temperature |
| C. | Its unsuitability under varying temperature conditions |
| D. | None of these |
| Answer» B. Substantially high change in fluidity of oil with temperature | |
| 17. |
Which is a high grade pulp? |
| A. | Rag pulp |
| B. | Mechanical pulp |
| C. | Sulphate pulp |
| D. | Sulphite pulp |
| Answer» D. Sulphite pulp | |
| 18. |
Molecular weight of plastics ranges from |
| A. | 5000 to 10000 |
| B. | 20000 to 250000 |
| C. | 500 to 5000 |
| D. | 106 to l09 |
| Answer» C. 500 to 5000 | |
| 19. |
Wax is a |
| A. | Mixture of glycerides |
| B. | Mixture of esters of polyhydric alcohols excepting glycerine |
| C. | Liquid at room temperature |
| D. | Mixture of glycerides of fatty acids |
| Answer» C. Liquid at room temperature | |
| 20. |
Washing of coal is done to |
| A. | Remove the inherent impurities |
| B. | Remove the adhering impurities |
| C. | Reduce the ash content |
| D. | Both B and C |
| Answer» E. | |
| 21. |
The biochemical treatment applied to sewage effluents is a process of |
| A. | Dehydration |
| B. | Reduction |
| C. | Oxidation |
| D. | Polymerisation |
| Answer» D. Polymerisation | |
| 22. |
Vulcanisation of rubber |
| A. | Decreases its tensile strength |
| B. | Increases its ozone & oxygen reactivity |
| C. | Increases its oil & solvent resistance |
| D. | Converts its plasticity into elasticity |
| Answer» E. | |
| 23. |
Viscose rayon is chemically |
| A. | Cellulose nitrate |
| B. | Regenerated cellulose nitrate |
| C. | Cellulose acetate |
| D. | Regenerated cellulose acetate |
| Answer» E. | |
| 24. |
Which of the following is not responsible for causing permanent hardness of water? |
| A. | Ca(HCO₃)₂ |
| B. | CaCl₂ |
| C. | MgCl₂ |
| D. | None of these |
| Answer» B. CaCl₂ | |
| 25. |
Which of the following processes can remove both temporary as well as permanent hardness of water? |
| A. | Filtration |
| B. | Boiling |
| C. | Distillation |
| D. | None of these |
| Answer» D. None of these | |
| 26. |
Catalytic oxidation of toluene produces |
| A. | Styrene |
| B. | Phenol |
| C. | Benzene |
| D. | Tri-nitro-toluene |
| Answer» C. Benzene | |
| 27. |
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 | |
| 28. |
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of |
| A. | Callagen |
| B. | Tannin |
| C. | Molasses |
| D. | Carbohydrate |
| Answer» B. Tannin | |
| 29. |
Viscose rayon |
| A. | Cannot be made from sulphite pulp |
| B. | Utilises H₂SO₄, NaOH and CS₂ during its manufacture |
| C. | Cannot yield textile grade fibre |
| D. | None of these |
| Answer» C. Cannot yield textile grade fibre | |
| 30. |
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 | |
| 31. |
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 | |
| 32. |
Use of water having dissolved oxygen in boilers promotes |
| A. | Corrosion |
| B. | Sequestration |
| C. | Scale formation |
| D. | None of these |
| Answer» B. Sequestration | |
| 33. |
In the production of soda ash by Solvay process, the by-product is |
| A. | CaCl₂ |
| B. | NH₄Cl |
| C. | NH₃ |
| D. | NaOH |
| Answer» B. NH₄Cl | |
| 34. |
Varnish does not contain |
| A. | Thinner |
| B. | Pigment |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 35. |
Vanillin is a type of |
| A. | Anti-pyretic drug |
| B. | Food preservative |
| C. | Flavour |
| D. | Dye |
| Answer» D. Dye | |
| 36. |
Pure rectified spirit contains about __________ percent alcohol. |
| A. | 45 |
| B. | 70 |
| C. | 95 |
| D. | 99.5 |
| Answer» D. 99.5 | |
| 37. |
Manufacture of phthalic anhydride uses __________ as a catalyst. |
| A. | Ni |
| B. | Cr |
| C. | V₂O₅ |
| D. | Al₂O₃ |
| Answer» D. Al₂O₃ | |
| 38. |
Lurgi coal gasifier is a pressurised __________ bed reactor. |
| A. | Moving |
| B. | Fixed |
| C. | Fluidised |
| D. | Entrained |
| Answer» B. Fixed | |
| 39. |
Roasting of metallurgical ores is done mainly to |
| A. | Dehydrate it |
| B. | Sinter the ore |
| C. | Remove CO₂ & H₂O |
| D. | Remove arsenic & sulphur |
| Answer» E. | |
| 40. |
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water. |
| A. | SO₃ |
| B. | Cl₂ |
| C. | NH₃ |
| D. | SO₂ |
| Answer» C. NH₃ | |
| 41. |
Sulphur addition in soap is done to |
| A. | Improve the soap texture |
| B. | Cure pimples & dandruff |
| C. | Fasten lather formation |
| D. | Increase its cleansing action |
| Answer» C. Fasten lather formation | |
| 42. |
Potassium is kept & transported under |
| A. | Water |
| B. | Liquid ammonia |
| C. | Kerosene oil |
| D. | Alcohol |
| Answer» D. Alcohol | |
| 43. |
Which of the following fuel gases contains maximum amount of carbon monoxide? |
| A. | Coke oven gas |
| B. | Water gas |
| C. | Blast furnace gas |
| D. | L.D. converter gas |
| Answer» E. | |
| 44. |
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 | |
| 45. |
__________ of quicklime produces slaked lime. |
| A. | Hydration |
| B. | Dehydration |
| C. | Hydrogenation |
| D. | None of these |
| Answer» B. Dehydration | |
| 46. |
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it |
| A. | Has larger production capacity per unit cell |
| B. | Consumes less power per ton of Cl₂ produced |
| C. | Produces high purity (70%) caustic soda directly |
| D. | All of the above |
| Answer» E. | |
| 47. |
Shrinkage volume in cement setting does not depend upon the |
| A. | Sand to cement ratio |
| B. | Water to cement ratio |
| C. | Ambient temperature fluctuation |
| D. | Drying period |
| Answer» B. Water to cement ratio | |
| 48. |
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 | |
| 49. |
Trinitro-toluene (TNT) is |
| A. | Used in glycerine manufacture |
| B. | An explosive |
| C. | Used in dye manufacture |
| D. | None of these |
| Answer» C. Used in dye manufacture | |
| 50. |
The enzyme which converts starch into the disacharides maltose is |
| A. | Diastase |
| B. | Maltase |
| C. | Yeast |
| D. | None of these |
| Answer» B. Maltase | |