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. |
Unsaturated oils compared to saturated oils have |
| A. | Lower melting point & higher reactivity to oxygen |
| B. | Higher melting point & higher reactivity to oxygen |
| C. | Lower melting point & lower reactivity to oxygen |
| D. | Higher melting point & lower reactivity to oxygen |
| Answer» B. Higher melting point & higher reactivity to oxygen | |
| 2. |
Dry ice (solidified CO₂) is used for the |
| A. | Storage & shipment of frozen foods and ice-creams |
| B. | Liquefaction of permanent gases |
| C. | Liquefaction of natural gas |
| D. | None of these |
| Answer» B. Liquefaction of permanent gases | |
| 3. |
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the |
| A. | Diamine and the ring |
| B. | Dibasic acid and the ring |
| C. | Diamine and the dibasic acid |
| D. | None of these |
| Answer» D. None of these | |
| 4. |
Coke used for the production of calcium carbide should have |
| A. | Low ash content |
| B. | Low ignition temperature |
| C. | High electrical resistivity |
| D. | All of the above |
| Answer» E. | |
| 5. |
'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of |
| A. | Final rolling out of paper |
| B. | Cutting of fibres |
| C. | Hydration of fibres |
| D. | Fibrillation of fibre |
| Answer» B. Cutting of fibres | |
| 6. |
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine? |
| A. | Na₂CO₃ |
| B. | NaHCO₃ |
| C. | H₂ |
| D. | None of these |
| Answer» D. None of these | |
| 7. |
Hydrochloric acid is also known as |
| A. | Oil of vitriol |
| B. | Muriatic acid |
| C. | Strong organic acid |
| D. | Green acid |
| Answer» C. Strong organic acid | |
| 8. |
Polymerisation product of C₂F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called |
| A. | Polyurethane |
| B. | Silicone |
| C. | Teflon |
| D. | Epoxy resin |
| Answer» D. Epoxy resin | |
| 9. |
CO & H₂ are the constituents of |
| A. | Producer gas |
| B. | Water gas |
| C. | Coke oven gas |
| D. | All of the above |
| Answer» E. | |
| 10. |
Nylon 6-6 is manufactured from |
| A. | Hexamethylene diamine and adipic acid |
| B. | Hexamethylene diamine and maleic anhydride |
| C. | Caprolactum |
| D. | Dimethyl terephthalate and ethylene glycol |
| Answer» B. Hexamethylene diamine and maleic anhydride | |
| 11. |
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil. |
| A. | Emulsification |
| B. | Dispersion |
| C. | Precipitation |
| D. | Wetting |
| Answer» D. Wetting | |
| 12. |
In premitive days, __________ was being manufactured by Leblanc Process. |
| A. | Alum |
| B. | Washing soda |
| C. | Soda ash |
| D. | Calcium carbide |
| Answer» D. Calcium carbide | |
| 13. |
Cellulose percentage in bamboo fibre is about |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 14. |
The basic constituent of vegetable oils is |
| A. | Triglyceride |
| B. | Fatty acids |
| C. | Fatty alcohol |
| D. | Mono esters |
| Answer» B. Fatty acids | |
| 15. |
Sodium carbonate (soda ash) is not used in the manufacture of |
| A. | Fire extinguishers |
| B. | Sugar |
| C. | Baking powder |
| D. | Detergents |
| Answer» E. | |
| 16. |
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as |
| A. | It is very corrosive at elevated temperature |
| B. | Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced) |
| C. | It decomposes on further increasing the temperature |
| D. | None of these |
| Answer» C. It decomposes on further increasing the temperature | |
| 17. |
Nylon-6 is a |
| A. | Polyamide |
| B. | Thermosetting resin |
| C. | Polyester |
| D. | None of these |
| Answer» B. Thermosetting resin | |
| 18. |
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? |
| A. | Cl₂ & Na |
| B. | Cl₂ & H₂ |
| C. | O₂ & H₂ |
| D. | Cl₂, H₂ & NaOH solution |
| Answer» E. | |
| 19. |
The purpose of tanning in leather industry is to |
| A. | Stiffen the leather |
| B. | Smoothen the leather |
| C. | Make it flexible |
| D. | Impart water resistance |
| Answer» B. Smoothen the leather | |
| 20. |
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement? |
| A. | Xanthates |
| B. | Stearic acid |
| C. | Calcium & aluminium stearate |
| D. | Formic acid |
| Answer» D. Formic acid | |
| 21. |
Boiling of water containing temporary hardness produces |
| A. | CO₂ |
| B. | CaSO₄ |
| C. | CaHCO₃ |
| D. | None of these |
| Answer» B. CaSO₄ | |
| 22. |
The major constituent of black liquor generated during paper manufacture is sodium |
| A. | Sulphate |
| B. | Carbonate |
| C. | Hydroxide |
| D. | Bi-carbonate |
| Answer» C. Hydroxide | |
| 23. |
Widely used method for the conditioning of boiler feed water is the |
| A. | Cold lime process |
| B. | Coagulation |
| C. | Hot-lime soda process |
| D. | Sequestration |
| Answer» D. Sequestration | |
| 24. |
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material? |
| A. | Slag cement |
| B. | Glasses |
| C. | Porcelain/Potteries |
| D. | Teflon |
| Answer» E. | |
| 25. |
H₂S is scrubbed from refinery gases by absorption using |
| A. | Dilute H₂SO₄ |
| B. | Ethanol amine |
| C. | Chilled water |
| D. | Tri-butyl phosphate |
| Answer» C. Chilled water | |
| 26. |
Neoprene is the trade name of |
| A. | Polyurathane |
| B. | Phenol formaldehyde |
| C. | Polychloroprene |
| D. | Styrene-butadiene rubber |
| Answer» D. Styrene-butadiene rubber | |
| 27. |
Neoprene is a |
| A. | Monomer |
| B. | Synthetic rubber |
| C. | Polyester |
| D. | None of these |
| Answer» C. Polyester | |
| 28. |
Sodium bisulphite is used for __________ water. |
| A. | Deaeration |
| B. | Dechlorination |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 29. |
Hydrocynic acid (HCN) is used as an insecticide for |
| A. | Controlling timber degradation by ants |
| B. | Controlling poultry lice |
| C. | Potato beetle |
| D. | Citrus fruits |
| Answer» E. | |
| 30. |
Ethanol amine is produced using ammonia and |
| A. | Ethyl benzene |
| B. | Ethylene oxide |
| C. | Ethanol |
| D. | Ethane |
| Answer» C. Ethanol | |
| 31. |
Which of the following is not an abrasive material ? |
| A. | Bakelite |
| B. | Pumice |
| C. | Corundum |
| D. | Carborundum |
| Answer» B. Pumice | |
| 32. |
Alum is commercially produced from |
| A. | Gypsum |
| B. | Feldspar |
| C. | Galena |
| D. | Bauxite |
| Answer» E. | |
| 33. |
Neon gas is |
| A. | Flammable in nature |
| B. | Used in color discharge tube |
| C. | Filled in lamps having tungsten filament |
| D. | All of the above |
| Answer» C. Filled in lamps having tungsten filament | |
| 34. |
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln? |
| A. | 500°C |
| B. | 750°C |
| C. | 1000°C |
| D. | 1500°C |
| Answer» D. 1500°C | |
| 35. |
Commercially ethylene is produced from naphtha by |
| A. | Catalytic cracking |
| B. | Catalytic dehydrogenation |
| C. | Pyrolysis |
| D. | Hydrocracking |
| Answer» E. | |
| 36. |
The manufacture of Kraft pulp is done by a/an __________ process. |
| A. | Alkaline |
| B. | Acidic |
| C. | Neutral |
| D. | None of these |
| Answer» B. Acidic | |
| 37. |
Which of the following is the second major component of cement? |
| A. | Al₂O₃ |
| B. | SiO₂ |
| C. | CaO |
| D. | Fe₂O₃ |
| Answer» C. CaO | |
| 38. |
Dehydrogenation of isopropanol produces |
| A. | Propyl alcohol |
| B. | Acetone |
| C. | Trichloroethylene |
| D. | Formaldehyde |
| Answer» C. Trichloroethylene | |
| 39. |
Which of the following has sodium bicarbonate as its main constituent ? |
| A. | Baking soda |
| B. | Baking powder |
| C. | Washing soda |
| D. | None of these |
| Answer» C. Washing soda | |
| 40. |
Na₂CO₃.10H₂O is called |
| A. | Washing soda |
| B. | Soda ash |
| C. | Slaked lime |
| D. | Quicklime |
| Answer» B. Soda ash | |
| 41. |
Na₂CO₃ is called |
| A. | Washing soda |
| B. | Soda ash |
| C. | Plaster of paris |
| D. | Calcite |
| Answer» C. Plaster of paris | |
| 42. |
Main use of liquid nitrogen is in |
| A. | Rocket propulsion |
| B. | Making gun powder |
| C. | Detergent manufacture |
| D. | Refrigerative cooling |
| Answer» E. | |
| 43. |
Oxidation of SO₂ to SO₃ is favoured by |
| A. | Low temperature and low pressure |
| B. | Low temperature and high pressure |
| C. | High temperature and low pressure |
| D. | High temperature and high pressure |
| Answer» C. High temperature and low pressure | |
| 44. |
Starting material for the commercial production of ethyl alcohol in India is |
| A. | Rice |
| B. | Molasses |
| C. | Fruit of Mahua tree |
| D. | Maize |
| Answer» C. Fruit of Mahua tree | |
| 45. |
Nitrogen is an essential component of |
| A. | Mineral salts |
| B. | Carbohydrates |
| C. | Fats |
| D. | Proteins |
| Answer» E. | |
| 46. |
In an integrated steel plant, NH₃ present in coke oven gas is normally recovered as |
| A. | (NH₄)2SO₄ |
| B. | NH₄Cl |
| C. | (NH₄)2 NO₃ |
| D. | Liquid NH₃ |
| Answer» B. NH₄Cl | |
| 47. |
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at |
| A. | SASOL (in South Africa) |
| B. | Redcar (U.K.) |
| C. | Los-Angles (U.S.A.) |
| D. | Trombay (India) |
| Answer» B. Redcar (U.K.) | |
| 48. |
Reverse osmosis is normally used for the |
| A. | Separation of isotopes of uranium from gaseous uranium hexaflouride |
| B. | Separation of helium from natural gas |
| C. | Desalination of brackish water to produce potable (drinking) water |
| D. | Purification of oxygen |
| Answer» D. Purification of oxygen | |
| 49. |
Which of the following is not produced on commercial scale from sea water? |
| A. | Bromine |
| B. | Magnesium compounds |
| C. | Potassium compounds |
| D. | Sodium sulphate |
| Answer» E. | |
| 50. |
A mineral is termed as 'ore', if |
| A. | A metal can be economically extracted from it |
| B. | It contains ≥ 40% metal |
| C. | The metal present in it is costly |
| D. | All of the above |
| Answer» B. It contains ≥ 40% metal | |