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. |
Linde process of gas liquefaction employs |
| A. | Exchange of heat with colder stream |
| B. | Adiabatic expansion through a throttle valve (Joule-Thomson expansion) |
| C. | Adiabatic expansion against a piston or in a turbine |
| D. | Merely compressing the gas beyond its critical pressure |
| Answer» C. Adiabatic expansion against a piston or in a turbine | |
| 2. |
Claude process of gas liquefaction employs |
| A. | Merely compression of gas beyond its critical pressure |
| B. | Joule-Thomson expansion cooling |
| C. | Heat exchange with colder stream |
| D. | Adiabatic expansion against a piston or in a turbine |
| Answer» E. | |
| 3. |
Most widely and commonly used coagulant for the removal of suspended impurities in water is |
| A. | Bleaching powder |
| B. | Slaked lime |
| C. | Alum |
| D. | Copper sulphate |
| Answer» D. Copper sulphate | |
| 4. |
Transparent soaps (e.g. Pears) are |
| A. | Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency |
| B. | Metallic soaps with frothing agent and free stearic acid to achieve transparency |
| C. | Metallic soaps with frothing agent from which glycerine has not been recovered |
| D. | None of these |
| Answer» B. Metallic soaps with frothing agent and free stearic acid to achieve transparency | |
| 5. |
Which of the following is used as a binding material in soap to improve soap texture? |
| A. | Rosin |
| B. | Borax |
| C. | Benzyl acetate |
| D. | Sodium carbonate |
| Answer» C. Benzyl acetate | |
| 6. |
In multistage equilibrium conversion of SO₂ to SO₃ (2SO₂ + O₂ ⇋ 2SO₃), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO₂ to SO₃ can be increased by |
| A. | Increasing the oxygen concentration |
| B. | Putting more quantity of V₂O₅ catalyst in the converter |
| C. | Removing some quantity of SO₃ during intermediate stage |
| D. | Maintaining low temperature & pressure in the converter |
| Answer» D. Maintaining low temperature & pressure in the converter | |
| 7. |
Pig iron is produced by blast furnaces in India using mostly the iron ore named |
| A. | Hematite |
| B. | Magnetite |
| C. | Siderite |
| D. | Chalcopyrite |
| Answer» B. Magnetite | |
| 8. |
Silicone is a/an |
| A. | Thermoplastic |
| B. | Inorganic polymer |
| C. | Monomer |
| D. | None of these |
| Answer» C. Monomer | |
| 9. |
Silicon carbide is a/an |
| A. | Adhesive |
| B. | Abrasive |
| C. | Type of glass |
| D. | Brittle material |
| Answer» C. Type of glass | |
| 10. |
Fat dispersed in water is exemplified by |
| A. | Colloids |
| B. | Gel |
| C. | Butter |
| D. | Emulsion |
| Answer» D. Emulsion | |
| 11. |
__________ process is used for producing soda ash. |
| A. | Chamber |
| B. | Chance |
| C. | Tromp |
| D. | Solvay |
| Answer» E. | |
| 12. |
Phthalic anhydride is produced by the oxidation of |
| A. | Naphthalene |
| B. | Benzene |
| C. | Toluene |
| D. | Aniline |
| Answer» C. Toluene | |
| 13. |
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 | |
| 14. |
Average sulphur content in Indian pyrites is about __________ percent. |
| A. | 15 |
| B. | 35 |
| C. | 55 |
| D. | 70 |
| Answer» C. 55 | |
| 15. |
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent. |
| A. | 75 |
| B. | < 10 |
| C. | > 30 |
| D. | 50 |
| Answer» C. > 30 | |
| 16. |
Hydrodenation of vegetable oils is a/an __________ reaction. |
| A. | Endothermic |
| B. | Autocatalytic |
| C. | Exothermic |
| D. | Homogenous |
| Answer» D. Homogenous | |
| 17. |
__________ is an ore concentrating metallurgical process involving a chemical change. |
| A. | Electromagnetic separation |
| B. | Froth floatation |
| C. | Roasting |
| D. | None of these |
| Answer» D. None of these | |
| 18. |
Sucrose is a disaccharide consisting of |
| A. | Glucose and glucose |
| B. | Glucose and fructose |
| C. | Glucose and galactose |
| D. | Fructose and galactose |
| Answer» C. Glucose and galactose | |
| 19. |
__________ is used as a catalyst in fat splitting. |
| A. | ZnO |
| B. | Ni |
| C. | V₂O₅ |
| D. | FeO |
| Answer» B. Ni | |
| 20. |
Builders are added in soap to act as |
| A. | Cleaning power booster |
| B. | Anti-redeposition agent |
| C. | Corrosion inhibitor |
| D. | Fabric brightener |
| Answer» B. Anti-redeposition agent | |
| 21. |
Hydrogenation of oil/fat does not |
| A. | Improve its resistance to rancid oxidation |
| B. | Raise its melting point |
| C. | Remove double bonds |
| D. | None of these |
| Answer» E. | |
| 22. |
Producer gas consists mainly of |
| A. | CO, CO₂ N₂, H₂ |
| B. | CO, H₂ |
| C. | H₂, CH₄ |
| D. | C₂H₂, CO₂, H₂ |
| Answer» B. CO, H₂ | |
| 23. |
A substance produced by a living organism and capable of anti-microbial activity is called a/an |
| A. | Antibiotic |
| B. | Antiseptic |
| C. | Disinfectant |
| D. | None of these |
| Answer» B. Antiseptic | |
| 24. |
Ultimate analysis of coal determines its __________ content. |
| A. | Carbon, hydrogen, nitrogen & sulphur |
| B. | Carbon, ash, sulphur & nitrogen |
| C. | Carbon, sulphur, volatile matter & ash |
| D. | Carbon, volatile matter, ash & moisture |
| Answer» D. Carbon, volatile matter, ash & moisture | |
| 25. |
Proximate analysis of coal determines its __________ content. |
| A. | Moisture, ash, sulphur & volatile matter |
| B. | Moisture & volatile matter |
| C. | Moisture, sulphur, nitrogen & fixed carbon |
| D. | None of these |
| Answer» C. Moisture, sulphur, nitrogen & fixed carbon | |
| 26. |
Adipic acid is an intermediate in the manufacture of |
| A. | Perspex |
| B. | Nylon-66 |
| C. | Polystyrene |
| D. | Bakelite |
| Answer» C. Polystyrene | |
| 27. |
Which of the following processes does not produce Cl₂ as a co-product during the manufacture of caustic soda? |
| A. | Diaphragm electrolytic cell process |
| B. | Mercury electrolytic cell process |
| C. | Lime-soda process |
| D. | None of these |
| Answer» D. None of these | |
| 28. |
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 | |
| 29. |
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about |
| A. | 0.1 to 0.5 |
| B. | 1 to 5 |
| C. | 5 to 10 |
| D. | 15 to 25 |
| Answer» B. 1 to 5 | |
| 30. |
Bromine is used in the preparation of |
| A. | Fire extinguishing compounds |
| B. | Fire proofing agents |
| C. | Dyes and antiknock compounds |
| D. | All of the above |
| Answer» E. | |
| 31. |
Gun powder, which is an explosive comprises of charcoal, sulphur and |
| A. | Glycerene |
| B. | Salt petre |
| C. | Nitro glycerene |
| D. | Dynamite |
| Answer» C. Nitro glycerene | |
| 32. |
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 | |
| 33. |
Yellow glycerine is made into white, using |
| A. | Activated carbon |
| B. | Diatomaceous earth |
| C. | Bauxite |
| D. | Bentonite |
| Answer» B. Diatomaceous earth | |
| 34. |
Riboflavin is a/an |
| A. | Vitamin |
| B. | Analgesic drug |
| C. | Anaesthetics |
| D. | Anti-malarial drug |
| Answer» B. Analgesic drug | |
| 35. |
Permanent hardness of water is due to the presence of calcium & magnesium |
| A. | Bi-carbonates |
| B. | Sulphates & chlorides |
| C. | Carbonate |
| D. | None of these |
| Answer» C. Carbonate | |
| 36. |
Starting material for the production of styrene butadiene rubber (SBR) is |
| A. | Ethyl alcohol |
| B. | Ethylene |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 37. |
Styrene butadiene rubber (SBR) is |
| A. | A natural rubber |
| B. | A synthetic polymer |
| C. | A synthetic monomer |
| D. | Another name of silicone rubber |
| Answer» C. A synthetic monomer | |
| 38. |
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process. |
| A. | Mechanical |
| B. | Sulphate/kraft |
| C. | Sulphite |
| D. | Neutral sulphite semi-chemical |
| Answer» E. | |
| 39. |
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 | |
| 40. |
Pick out the exothermic reaction out of the following: |
| A. | C + H₂O = CO + H₂ |
| B. | CaC₂ + H₂O = Ca(OH)₂ + C₂H₂ |
| C. | MgCO₃ = MgO + CO₂ |
| D. | All of the above |
| Answer» C. MgCO₃ = MgO + CO₂ | |
| 41. |
Pick out the endothermic reaction out of the following. |
| A. | C+1/2O₂ = CO |
| B. | CO + 3H₂ = CH₄ + H₂O |
| C. | CaCO₃ = CaO + CO₂ |
| D. | CO +1/2O₂ = CO₂ |
| Answer» D. CO +1/2O₂ = CO₂ | |
| 42. |
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 | |
| 43. |
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C. |
| A. | -5 to 0 |
| B. | 5 to 10 |
| C. | 30 to 50 |
| D. | 75 to 80 |
| Answer» D. 75 to 80 | |
| 44. |
Hydrazine is used in water treatment for the removal of |
| A. | Colloidal impurities |
| B. | Dissolved oxygen |
| C. | Turbidity |
| D. | Chlorinous taste |
| Answer» C. Turbidity | |
| 45. |
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide |
| A. | Increases |
| B. | Increases linearly |
| C. | Decreases |
| D. | Decreases linearly |
| Answer» D. Decreases linearly | |
| 46. |
Setting of plaster of paris is accompanied with |
| A. | Hydration |
| B. | Dehydration |
| C. | Hydrolysis |
| D. | Loss of CO₂ |
| Answer» B. Dehydration | |
| 47. |
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C. |
| A. | <0 |
| B. | 10-30 |
| C. | 250-280 |
| D. | 500-600 |
| Answer» C. 250-280 | |
| 48. |
L.D. converter is used in the production of |
| A. | Pig iron |
| B. | Steel |
| C. | Copper |
| D. | Zinc |
| Answer» C. Copper | |
| 49. |
Conversion of SO₂ to SO₃ in Monsanto 4-pass converter is about __________ percent. |
| A. | 80 |
| B. | 90 |
| C. | 98 |
| D. | 100 |
| Answer» D. 100 | |
| 50. |
Oil produced by solvent extraction |
| A. | Has low free fatty acid content |
| B. | Is odourless |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» E. | |