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. |
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. | |
| 2. |
In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because |
| A. | SO₃ gas is sparingly soluble in water |
| B. | Water forms an acid mist, which is difficult to absorb |
| C. | The purity of acid is affected |
| D. | Scale formation in the absorber is to be avoided |
| Answer» C. The purity of acid is affected | |
| 3. |
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 | |
| 4. |
10% oleum comprises of 10% free |
| A. | SO₂ |
| B. | H₂SO₃ |
| C. | SO₃ |
| D. | H₂SO₄ |
| Answer» D. H₂SO₄ | |
| 5. |
__________ is an ore of lead. |
| A. | Quartz |
| B. | Galena |
| C. | Siderite |
| D. | Chalcopyrite |
| Answer» C. Siderite | |
| 6. |
__________ is a polysacchride. |
| A. | Maltose |
| B. | Starch |
| C. | Sucrose |
| D. | Glucose |
| Answer» C. Sucrose | |
| 7. |
Metallic soap is __________ salt of fatty acids. |
| A. | Sodium |
| B. | Potassium |
| C. | Both sodium & potassium |
| D. | Aluminium or calcium |
| Answer» E. | |
| 8. |
Consider the production of ammonia from methene and air as raw materials. The catalyst used are:(i) __________ for steam reforming of methane and(ii) __________ for ammonia synthesis. |
| A. | (i) - Ni/Al2O₃; (ii) - Cu - ZnO/Al2O₃ |
| B. | (i) - Fe/Al2O₃; (ii) - Cu - ZnO/Al2O₃ |
| C. | (i) - Ni/Al2O₃; (ii) - Fe/Al2O₃ |
| D. | (i) - Fe/Al2O₃; (ii) - Ni/Al2O₃ |
| Answer» D. (i) - Fe/Al2O₃; (ii) - Ni/Al2O₃ | |
| 9. |
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood. |
| A. | 1 |
| B. | 2.5 |
| C. | 5 |
| D. | 10 |
| Answer» C. 5 | |
| 10. |
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials. |
| A. | Adsorbs |
| B. | Oxidises |
| C. | Reduces |
| D. | Converts |
| Answer» B. Oxidises | |
| 11. |
Polythene is a/an __________ polymerisation product. |
| A. | Addition |
| B. | Condensation |
| C. | Thermosetting |
| D. | None of these |
| Answer» B. Condensation | |
| 12. |
Fire clay is __________ refractory material. |
| A. | A basic |
| B. | An acidic |
| C. | A neutral |
| D. | Not a |
| Answer» C. A neutral | |
| 13. |
More than 100 percent of __________ is present in oleum. |
| A. | SO₃ |
| B. | H₂SO₄ |
| C. | H₂SO₃ |
| D. | SO₂ |
| Answer» C. H₂SO₃ | |
| 14. |
For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison. |
| A. | (i) platinum (ii) sulphur |
| B. | (i) palladium (ii) oxygen |
| C. | (i) nickel (ii) sulphur |
| D. | (i) nickel (ii) oxygen |
| Answer» D. (i) nickel (ii) oxygen | |
| 15. |
Pencillin is made employing __________ fermentation process. |
| A. | Continuous |
| B. | Aerobic batch |
| C. | Anaerobic batch |
| D. | None of these |
| Answer» C. Anaerobic batch | |
| 16. |
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture. |
| A. | CaO |
| B. | MnO₂ |
| C. | ZnO |
| D. | FeS |
| Answer» D. FeS | |
| 17. |
Free alkali in a toilet soap is __________ that in a laundary shop. |
| A. | Less than |
| B. | More than |
| C. | Same |
| D. | None of these |
| Answer» B. More than | |
| 18. |
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. | |
| 19. |
Commercial production of Vanaspati is done by __________ of edible vegetable oils. |
| A. | Hydrogenation |
| B. | Oxidation |
| C. | Hydrolysis |
| D. | Hydrocracking |
| Answer» B. Oxidation | |
| 20. |
__________ is a thermosetting plastic. |
| A. | Polyvinyl chloride |
| B. | Polythene |
| C. | Bakelite |
| D. | Teflon |
| Answer» D. Teflon | |
| 21. |
Titanium dioxide is a/an __________ colour pigment. |
| A. | White |
| B. | Black |
| C. | Yellow |
| D. | Blue |
| Answer» B. Black | |
| 22. |
Poly Vinyl Chloride (P.V.C.) is a __________ material. |
| A. | Thermosetting |
| B. | Thermoplastic |
| C. | Fibrous |
| D. | Chemically active |
| Answer» C. Fibrous | |
| 23. |
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the |
| A. | L.D. converter |
| B. | Blast furnace |
| C. | Rotary kiln |
| D. | Recuperator |
| Answer» E. | |
| 24. |
At a given temperature, the equilibrium yield of SO₃ obtained from the oxidation of SO₂ is proportional to (where, P = pressure of the system ) |
| A. | P |
| B. | √P |
| C. | P² |
| D. | 1/P |
| Answer» C. P² | |
| 25. |
Dense soda ash used in the manufacture of glass, is chemically represented by |
| A. | Na₂CO₃ |
| B. | Na₂CO₃.10H₂O |
| C. | Na₂CO₃.H₂O |
| D. | Na₂HCO₃ |
| Answer» D. Na₂HCO₃ | |
| 26. |
The gasification reaction represented by, C + H₂O = CO + H₂, is a/an __________ reaction. |
| A. | Exothermic |
| B. | Endothermic |
| C. | Catalytic |
| D. | Autocatalytic |
| Answer» C. Catalytic | |
| 27. |
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 | |
| 28. |
Cumene (isopropyl benzene) is made by |
| A. | Oxidation of napthalene |
| B. | Propylene alkylation of benzene |
| C. | Polymerisation of a mixture of benzene & propylene |
| D. | None of these |
| Answer» C. Polymerisation of a mixture of benzene & propylene | |
| 29. |
Fish contains about __________ percent oil. |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 35 |
| Answer» D. 35 | |
| 30. |
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 | |
| 31. |
Paper grade bamboo contains about __________ percent cellulose. |
| A. | 5 |
| B. | 20 |
| C. | 40 |
| D. | 60 |
| Answer» B. 20 | |
| 32. |
Solvay process as compared to dual process (i.e. modified Solvay process) |
| A. | Can use low grade brine |
| B. | Has less corrosion problems |
| C. | Involves higher investment in NH₃ recovery units than that for crystallisation units for NH₄Cl |
| D. | Both B and C |
| Answer» E. | |
| 33. |
The most economical pulp for the production of newsprint would be the __________ pulp. |
| A. | Groundwood |
| B. | Sulphate |
| C. | Sulphite |
| D. | Semichemical |
| Answer» B. Sulphate | |
| 34. |
Type of glass used in optical work is the __________ glass. |
| A. | Soda-lime |
| B. | Fibre |
| C. | Lead |
| D. | Borosilicate |
| Answer» D. Borosilicate | |
| 35. |
The main use of activated carbon in water treatment is to control |
| A. | Bacterial growth |
| B. | Taste and odour |
| C. | Turbidity |
| D. | None of these |
| Answer» C. Turbidity | |
| 36. |
Calgon used in water treatment is chemically |
| A. | Sodium phosphate |
| B. | Sodium hexametaphosphate |
| C. | Calcium phosphate |
| D. | Tricresyl phosphate |
| Answer» C. Calcium phosphate | |
| 37. |
The purpose of adding Na₂CO₃ to water of low alkalinity is to |
| A. | Permit the use of alum as a coagulant |
| B. | Increase the softening capacity of zeolite |
| C. | Facilitate easy regeneration of zeolite |
| D. | All of the above |
| Answer» B. Increase the softening capacity of zeolite | |
| 38. |
Which glass is usually used in optical work? |
| A. | Lead glass |
| B. | High silica (borosilicate) glass |
| C. | Photo-sensitive glass |
| D. | Fibre glass |
| Answer» D. Fibre glass | |
| 39. |
Solvent used for extraction of oil is |
| A. | Hexane |
| B. | Methyl ethyl ketone |
| C. | Furfurol |
| D. | None of these |
| Answer» B. Methyl ethyl ketone | |
| 40. |
Phenol formaldehyde resin is used as an adhesive in making |
| A. | Laminates |
| B. | Card boxes |
| C. | Furniture |
| D. | Books |
| Answer» B. Card boxes | |
| 41. |
Deaeration of water in its treatment is necessary, as it |
| A. | Minimises its turbidity |
| B. | Helps in controlling its taste and odour |
| C. | Minimises its corrosiveness |
| D. | None of these |
| Answer» D. None of these | |
| 42. |
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 | |
| 43. |
Bleaching action of bleaching powder is due to its __________ properties. |
| A. | Reducing |
| B. | Oxidising |
| C. | Disinfecting |
| D. | None of these |
| Answer» C. Disinfecting | |
| 44. |
Which of the following coals has the highest calorific value? |
| A. | Lignite |
| B. | Sub-bituminous |
| C. | Anthracite |
| D. | Peat |
| Answer» D. Peat | |
| 45. |
Comparing sulphate process with sulphite process, we find that __________ in the later. |
| A. | Both temperature & pressure in the former is less than that |
| B. | Both temperature & pressure in the former is more than that |
| C. | Temperature is more in the former whereas pressure is more |
| D. | Pressure is more in the former whereas temperature is less |
| Answer» C. Temperature is more in the former whereas pressure is more | |
| 46. |
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 | |
| 47. |
High temperature carbonisation of coal takes place at __________ °C. |
| A. | 2000 |
| B. | 700 |
| C. | 1100 |
| D. | < 500 |
| Answer» D. < 500 | |
| 48. |
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine. |
| A. | Chlorine |
| B. | Ammonium chloride |
| C. | Sodium carbonate |
| D. | Sodium bi-carbonate |
| Answer» B. Ammonium chloride | |
| 49. |
Hydrophilic group of a soap or detergent solution is |
| A. | Water hating |
| B. | Soil loving |
| C. | Water loving |
| D. | None of these |
| Answer» D. None of these | |
| 50. |
Naphthalene is removed from coke oven gas by |
| A. | Adsorbing on palladium |
| B. | Absorbing in ethanolamine |
| C. | Scrubbing with wash oil |
| D. | Passing it through electrostatic precipitator |
| Answer» D. Passing it through electrostatic precipitator | |