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. |
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 of the above |
| Answer» D. All of the above | |
| 2. |
Sulphuric acid saturated with SO₃ is called |
| A. | Concentrated H₂SO₄ |
| B. | Sulphurous acid |
| C. | Oleum |
| D. | None of these |
| Answer» D. None of these | |
| 3. |
The catalyst used in the manufacture of DDT is |
| A. | Alumina |
| B. | Silica |
| C. | 20% oleum |
| D. | Aluminium chloride |
| Answer» D. Aluminium chloride | |
| 4. |
Enzymes are organic catalysts used in the __________ reactions. |
| A. | Chemical |
| B. | Biochemical |
| C. | Photochemical |
| D. | Electrochemical |
| Answer» C. Photochemical | |
| 5. |
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an |
| A. | Surfactant |
| B. | Builder |
| C. | Optical brightening agent |
| D. | Anti soil redeposition agent |
| Answer» E. | |
| 6. |
Good quality of edible salt is obtained from brine by the process of |
| A. | Solar evaporation |
| B. | Vacuum evaporation |
| C. | Freeze drying |
| D. | Electrolysis |
| Answer» C. Freeze drying | |
| 7. |
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on |
| A. | Slaked lime |
| B. | Soda lime |
| C. | Calcium perchlorate |
| D. | None of these |
| Answer» B. Soda lime | |
| 8. |
Paper pulp produced by kraft/sulphate process is |
| A. | Bleached easily |
| B. | Dull white in color |
| C. | Strong fibrous |
| D. | Dark colored |
| Answer» D. Dark colored | |
| 9. |
Commercial production of calcium carbide requires limestone and __________ as raw materials. |
| A. | Coke |
| B. | Sand |
| C. | Soda ash |
| D. | Fuel oil |
| Answer» C. Soda ash | |
| 10. |
Starting material for the production of butadiene in India is |
| A. | Naphthalene |
| B. | Benzol |
| C. | Ethyl alcohol |
| D. | Phthalic anhydride |
| Answer» D. Phthalic anhydride | |
| 11. |
Sudden temperature fluctuation does not affect pyrex glass, because of its |
| A. | Low co-efficient of expansion |
| B. | High co-efficient of expansion |
| C. | High melting point |
| D. | Both B and C |
| Answer» B. High co-efficient of expansion | |
| 12. |
Glycerine is a by-product of the __________ industry. |
| A. | Soap |
| B. | Detergent |
| C. | Oil hydrogenation |
| D. | Paint |
| Answer» B. Detergent | |
| 13. |
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 | |
| 14. |
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 | |
| 15. |
Styrene-butadiene-rubber (SBR) as compared to natural rubber has |
| A. | Poorer tensile strength |
| B. | Poorer resistance to oxidation |
| C. | Greater amount of heat build-up under heavy loading |
| D. | All of the above |
| Answer» E. | |
| 16. |
The end bleaching agent used to move last traces of colour bodies from the pulp is |
| A. | Chlorine dioxide (ClO₂) |
| B. | MgO |
| C. | SO₂ gas |
| D. | Mercaptans |
| Answer» B. MgO | |
| 17. |
Fermentation of molasses to produce ethyl alcohol is done at __________ °C |
| A. | 20 - 30 |
| B. | < - 5 |
| C. | 100 - 150 |
| D. | 250 - 300 |
| Answer» B. < - 5 | |
| 18. |
Raw material used in alcohol distilleries in India is |
| A. | Molasses |
| B. | Benzol |
| C. | Methylated spirit |
| D. | None of these |
| Answer» B. Benzol | |
| 19. |
The process involved in converting rubber into a thin sheet or coating it on fabric is called |
| A. | Extrusion |
| B. | Mastication |
| C. | Calendering |
| D. | Valcanisation |
| Answer» D. Valcanisation | |
| 20. |
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 of the above |
| Answer» E. | |
| 21. |
Which of the following is used as a coagulant in water treatment? |
| A. | Chloramine |
| B. | Chlorine |
| C. | Ferrous sulphate |
| D. | Hydrogen peroxide |
| Answer» D. Hydrogen peroxide | |
| 22. |
CaCl(OCl) is the chemical formula of |
| A. | Hypo |
| B. | Bleaching powder |
| C. | Plaster of paris |
| D. | Aqua regia |
| Answer» C. Plaster of paris | |
| 23. |
Main product in calcium carbide-water reaction is |
| A. | Ca(OH)₂ |
| B. | C₂H₂ |
| C. | CO₂ |
| D. | CaCO₃ |
| Answer» C. CO₂ | |
| 24. |
Chemical name of soda ash is |
| A. | Sodium bicarbonate |
| B. | Sodium thiosulphate |
| C. | Potassium carbonate |
| D. | None of these |
| Answer» E. | |
| 25. |
Chemical name of 'alum' is |
| A. | Barium sulphate |
| B. | Aluminium sulphate |
| C. | Aluminium chloride |
| D. | Calcium sulphate |
| Answer» C. Aluminium chloride | |
| 26. |
Chemical formula of oleum is |
| A. | H₂SO₃ |
| B. | H₂SO₄ |
| C. | H₂S₂O₇ |
| D. | H₂SO₇ |
| Answer» D. H₂SO₇ | |
| 27. |
Cement mainly contains |
| A. | CaO, SiO₂, Al2O₃ |
| B. | MgO, SiO₂, K₂O |
| C. | Al2O₃, MgO, FE₂O₃ |
| D. | CaO, MgO, K₂O |
| Answer» B. MgO, SiO₂, K₂O | |
| 28. |
Celluloid is chemically |
| A. | Cellulose acetate |
| B. | Regenerated cellulose |
| C. | Cellulose nitrate |
| D. | Cellulose acetate butyrate |
| Answer» D. Cellulose acetate butyrate | |
| 29. |
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? |
| A. | Sodium silicate |
| B. | Sodium borate |
| C. | Sodium tripolyphosphate (STPP) |
| D. | Caustic soda |
| Answer» C. Sodium tripolyphosphate (STPP) | |
| 30. |
Aryl benzene sulphonate (ABS) is a |
| A. | Detergent |
| B. | Plasticiser for unsaturated polyester |
| C. | Starting material for the synthesis of glycerine |
| D. | Coating ingredient for photographic film |
| Answer» B. Plasticiser for unsaturated polyester | |
| 31. |
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 | |
| 32. |
Percentage of alcohol in beer may be around __________ percent. |
| A. | 2-8 |
| B. | 18-23 |
| C. | 27-32 |
| D. | 1-4 |
| Answer» B. 18-23 | |
| 33. |
Sucrose content in cane sugar may be around __________ percent. |
| A. | 50 |
| B. | 70 |
| C. | 80 |
| D. | 95 |
| Answer» E. | |
| 34. |
Hydrogenation of oil takes place in a/an __________ reactor. |
| A. | Autothermal |
| B. | Trickle bed |
| C. | Plug flow |
| D. | None of these |
| Answer» C. Plug flow | |
| 35. |
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 | |
| 36. |
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. | |
| 37. |
CaSO₄ .1/2 H₂O is known as |
| A. | Blue vitriol |
| B. | Plaster of Paris |
| C. | Gypsum |
| D. | Zeolite |
| Answer» C. Gypsum | |
| 38. |
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in |
| A. | Pyrolysis of oil |
| B. | Sintering of porous catalyst |
| C. | Hydrogen embrittlement |
| D. | All of the above |
| Answer» E. | |
| 39. |
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 | |
| 40. |
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 | |
| 41. |
The noble gas which occurs most abundantly in the atmosphere is |
| A. | Helium |
| B. | Neon |
| C. | Krypton |
| D. | Argon |
| Answer» E. | |
| 42. |
Bordeaux mixture is a/an |
| A. | Fertiliser |
| B. | Inorganic fungicide |
| C. | Insecticide |
| D. | Explosive |
| Answer» C. Insecticide | |
| 43. |
High temperature carbonisation of coal produces |
| A. | Inferior coke compared to low temperature carbonisation |
| B. | Less of gases compared to liquid products |
| C. | Larger quantity of tar compared to low temperature carbonisation |
| D. | None of these |
| Answer» E. | |
| 44. |
CaO is called |
| A. | Quick lime |
| B. | Slaked lime |
| C. | Limestone |
| D. | Calcite |
| Answer» B. Slaked lime | |
| 45. |
Calcination of gypsum produces |
| A. | Plaster of paris |
| B. | Salt cake |
| C. | Nitre cake |
| D. | Lime |
| Answer» B. Salt cake | |
| 46. |
Ca(OH)₂ is called |
| A. | Quicklime |
| B. | Slaked lime |
| C. | Limestone |
| D. | Gypsum |
| Answer» C. Limestone | |
| 47. |
Sand and __________ is fused at 1300°C, to produce sodium silicate. |
| A. | Limestone |
| B. | Soda ash |
| C. | Coke |
| D. | Sodium sulphate |
| Answer» C. Coke | |
| 48. |
Blue vitriol is chemically |
| A. | Copper sulphate |
| B. | Ferrous sulphate |
| C. | Copper nitrate |
| D. | Aluminium sulphate |
| Answer» B. Ferrous sulphate | |
| 49. |
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 | |
| 50. |
Bitterns is a/an |
| A. | Unsaturated fat |
| B. | Starting material for the production of iodine |
| C. | By-product of chlor-alkali industry |
| D. | None of these |
| Answer» E. | |