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. |
Coagulant is used __________ filtration. |
| A. | Before |
| B. | After |
| C. | During |
| D. | To avoid |
| Answer» B. After | |
| 2. |
The most stable allotropic form of phosphorous is the __________ phosphorous. |
| A. | White |
| B. | Black |
| C. | Yellow |
| D. | Red |
| Answer» C. Yellow | |
| 3. |
White phosphorous is stored under water, because |
| A. | It does not react with water |
| B. | It is poisonous |
| C. | Its kindling temperature in dry air is very low |
| D. | It is unstable |
| Answer» D. It is unstable | |
| 4. |
Zeolite used in water softening process (cation exchange) is regenerated by washing with |
| A. | Brine |
| B. | Chloramines |
| C. | Sodium bisulphite |
| D. | Liquid chlorines |
| Answer» B. Chloramines | |
| 5. |
Which of the following is an unsaturated fatty acid? |
| A. | Lauric acid |
| B. | Palmitic acid |
| C. | Stearic acid |
| D. | Oleic acid |
| Answer» E. | |
| 6. |
Basic oxide is absent in __________ glass. |
| A. | Flint |
| B. | Pyrex |
| C. | Quartz |
| D. | All of the above |
| Answer» D. All of the above | |
| 7. |
Sodium chloride content in sea water is about __________ gms/litre. |
| A. | 2 |
| B. | 10 |
| C. | 25 |
| D. | 50 |
| Answer» D. 50 | |
| 8. |
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda |
| A. | Sodium sulphide & sodium carbonate |
| B. | Sodium sulphite & sodium carbonate |
| C. | Sodium sulphite & sodium sulphide |
| D. | None of these |
| Answer» B. Sodium sulphite & sodium carbonate | |
| 9. |
The combustion reaction, C + O₂ = CO₂, is |
| A. | Exothermic |
| B. | Endothermic |
| C. | Autocatalytic |
| D. | None of these |
| Answer» B. Endothermic | |
| 10. |
Catalytic oxidation-dehydrogenation of methyl alcohol produces |
| A. | Formaldehyde |
| B. | Phenol |
| C. | Acetone |
| D. | Maleic anhydride |
| Answer» B. Phenol | |
| 11. |
The function of gypsum addition during cement making is to |
| A. | Increase the density of cement |
| B. | Decrease the cement setting rate |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» C. Both A and B | |
| 12. |
Insulin is an __________ drug. |
| A. | Anti-malarial |
| B. | Anti-TB |
| C. | Antibiotic |
| D. | None of these |
| Answer» E. | |
| 13. |
Carbon disulphide is mainly used in the production of |
| A. | Viscose rayon |
| B. | Corundum |
| C. | Plasticiser for unsaturated polyester |
| D. | Paints |
| Answer» B. Corundum | |
| 14. |
Pick out the wrong statement pertaining to the soap manufacture. |
| A. | Transparent soaps are made by cold process |
| B. | Organic pigments are used as colouring materials in the soap manufacture |
| C. | Both laundary as well as toilet soaps are manufactured by hot process |
| D. | Colourless rosin is used in the manufacture of laundary soaps |
| Answer» B. Organic pigments are used as colouring materials in the soap manufacture | |
| 15. |
Flux addition during smelting of ore is done to |
| A. | Remove impurities/gangue |
| B. | Enhance rate of reaction |
| C. | Accelerate reduction of ore |
| D. | Separate slag from metal |
| Answer» B. Enhance rate of reaction | |
| 16. |
__________ is produced using polycondensation reaction. |
| A. | Polythene |
| B. | Phenol formaldehyde |
| C. | Poly vinyl chloride |
| D. | None of these |
| Answer» C. Poly vinyl chloride | |
| 17. |
Bleaching of paper pulp is done with |
| A. | Activated clay |
| B. | Bromine |
| C. | Chlorine or chlorine dioxide |
| D. | Magnesium sulphite |
| Answer» D. Magnesium sulphite | |
| 18. |
Use of chlorine in the treatment of sewage |
| A. | Helps in grease separation |
| B. | Increases the biological oxygen demand(BOD) |
| C. | Causes bulking of activated sludge |
| D. | Aids in flocculation |
| Answer» B. Increases the biological oxygen demand(BOD) | |
| 19. |
In the Lurgi coal gasifier |
| A. | Coking coals cannot be used |
| B. | Low carbon conversion efficiency is achieved |
| C. | Entrainment of solids is higher |
| D. | Large quantity of coal can be processed |
| Answer» E. | |
| 20. |
Catalyst used in the hydrogenation of oil is |
| A. | Nickel |
| B. | Platinum |
| C. | Iron |
| D. | Alumina |
| Answer» B. Platinum | |
| 21. |
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at |
| A. | 1 atm & 100°C |
| B. | 5 atm & 275°C |
| C. | 100 atm & 500°C |
| D. | 50 atm & 1000°C |
| Answer» C. 100 atm & 500°C | |
| 22. |
Main constituent of limestone is |
| A. | CaCO₃ |
| B. | MgCO₃ |
| C. | Na₂CO₃ |
| D. | CaSO₄ |
| Answer» B. MgCO₃ | |
| 23. |
The main component of pyrex glass is |
| A. | Zinc |
| B. | Lead |
| C. | Boron |
| D. | Celenium |
| Answer» C. Boron | |
| 24. |
Cooking liquor in case of sulphite process is |
| A. | Sodium sulphite and sodium bisulphite |
| B. | Magnesium sulphite and free SO₂ in acid medium |
| C. | Magnesium sulphate and magnessium bicarbonate |
| D. | None of these |
| Answer» B. Magnesium sulphite and free SO₂ in acid medium | |
| 25. |
Essential oils are usually obtained using |
| A. | Steam distillation |
| B. | Extractive distillation |
| C. | Solvent extraction |
| D. | Leaching |
| Answer» E. | |
| 26. |
Which of the following impurities in feed water for high pressure boiler is the most detrimental? |
| A. | Silica |
| B. | Dissolved oxygen |
| C. | Suspended salt |
| D. | Dissolved salt |
| Answer» B. Dissolved oxygen | |
| 27. |
High purity nitrogen is used in |
| A. | Making protective gas (95% N₂ + 5% H₂) for annealing of cold rolled steel strip coils |
| B. | Fire fighting purposes |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 28. |
Stereospecific agents are exemplified by |
| A. | Radiation |
| B. | Supported metal oxide catalysts |
| C. | Ziegler catalysts |
| D. | All of the above |
| Answer» E. | |
| 29. |
Brackish water which contains mostly dissolved salt, can be purified by the __________ process. |
| A. | Reverse osmosis |
| B. | Sand filter |
| C. | Lime soda |
| D. | Permutit |
| Answer» B. Sand filter | |
| 30. |
Rotary kiln is not involved in the production of |
| A. | Cement |
| B. | Lime from limestone |
| C. | Slaked lime from quick lime |
| D. | None of these |
| Answer» D. None of these | |
| 31. |
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. |
| A. | Pyrex |
| B. | Soda lime |
| C. | Lead |
| D. | High silica |
| Answer» B. Soda lime | |
| 32. |
The ideal pulp for the manufacture of paper should have high __________ content. |
| A. | Cellulose |
| B. | Lignin |
| C. | Both A & B |
| D. | None of these |
| Answer» B. Lignin | |
| 33. |
A good quality coal should have |
| A. | Low fusion point of ash |
| B. | High ash content |
| C. | High sulphur content |
| D. | None of these |
| Answer» E. | |
| 34. |
Which of the following processes is absent in glass manufacturing process? |
| A. | Sintering |
| B. | Annealing |
| C. | Shaping or forming |
| D. | Melting |
| Answer» B. Annealing | |
| 35. |
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene? |
| A. | AgO |
| B. | Al2O₃ |
| C. | ZnCl₂ |
| D. | FE₂O₃ |
| Answer» B. Al2O₃ | |
| 36. |
Plasticisers are added to paints to |
| A. | Make it corrosion resistant |
| B. | Make glossy surface |
| C. | Give elasticity & prevent cracking of the film |
| D. | Increase atmospheric oxidation |
| Answer» D. Increase atmospheric oxidation | |
| 37. |
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction. |
| A. | Endothermic |
| B. | Exothermic |
| C. | Irreversible |
| D. | Both B and C |
| Answer» E. | |
| 38. |
Chemical formula of 'salt cake' is |
| A. | Na₂SO₄ |
| B. | CaSO₄ |
| C. | MgSO₄ |
| D. | BaSO₄ |
| Answer» B. CaSO₄ | |
| 39. |
Pencillin, an antibiotic drug was discovered by |
| A. | Alexender |
| B. | Flaming |
| C. | Dr. Zivago |
| D. | None of these |
| Answer» B. Flaming | |
| 40. |
Ethyl alcohol cannot be produced |
| A. | From waste sulphite substrate of paper mills |
| B. | By esterification and hydroloysis of ethylene |
| C. | From molasses |
| D. | None of these |
| Answer» E. | |
| 41. |
Hydrolysis of sugar is called |
| A. | Hydration |
| B. | Inversion |
| C. | Esterification |
| D. | None of these |
| Answer» C. Esterification | |
| 42. |
Hydrogenation of oil does not |
| A. | Remove double bonds |
| B. | Raise its melting point |
| C. | Improve its resistance to oxidation |
| D. | None of these |
| Answer» E. | |
| 43. |
Hydrazine is largely used |
| A. | As a starting material for 'hypo' |
| B. | In photographic industry |
| C. | As rocket fuel |
| D. | In printing industry |
| Answer» D. In printing industry | |
| 44. |
SO₂ is bubbled through hot sugar cane juice to |
| A. | Act as an acidifying agent |
| B. | Increase its concentration |
| C. | Increase the amount of molasses |
| D. | Increase the crystal size |
| Answer» B. Increase its concentration | |
| 45. |
Industrial production of chloroform requires acetone and |
| A. | Phosgene |
| B. | Calcium hypochlorite |
| C. | Chlorine |
| D. | Ammonium chloride |
| Answer» C. Chlorine | |
| 46. |
Thermosetting plastic materials |
| A. | Can be repeatedly melted |
| B. | Is useful for melt casting |
| C. | Can not be melted after forming |
| D. | Is useful for spinning |
| Answer» D. Is useful for spinning | |
| 47. |
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. | |
| 48. |
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants. |
| A. | Independent of |
| B. | Directly proportional to |
| C. | Inversely proportional to |
| D. | Proportional to the square of |
| Answer» B. Directly proportional to | |
| 49. |
Hard water |
| A. | Does not affect the lather formation by soap |
| B. | Is not unfit for drinking purpose |
| C. | Pollutes the water stream |
| D. | All of the above |
| Answer» C. Pollutes the water stream | |
| 50. |
Iron ore hametite is concentrated using |
| A. | Electro magnetic separation mainly |
| B. | Gravity separation |
| C. | Froth floatation |
| D. | Roasting |
| Answer» C. Froth floatation | |