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. |
Naphthols are derivates of |
| A. | Methyl amine |
| B. | Naphthalene |
| C. | Phenol |
| D. | Xylene |
| Answer» C. Phenol | |
| 2. |
Blue colour is imparted to glass by the addition of |
| A. | FeSO4 |
| B. | PbO |
| C. | CaO |
| D. | NaOH |
| Answer» D. NaOH | |
| 3. |
Permanent hardness of water can be removed by |
| A. | Boiling |
| B. | Adding Ca(OH)2 |
| C. | Boiling it with Na2CO3 |
| D. | None of these |
| Answer» D. None of these | |
| 4. |
Which one of the following is not an elastomer? |
| A. | Polyisoprene |
| B. | Neoprene |
| C. | Nitrile-butadiene |
| D. | None of these |
| Answer» E. | |
| 5. |
Production of one ton of cement requires about __________ tons of limestone. |
| A. | 0.6 |
| B. | 1.2 |
| C. | 2.2 |
| D. | 3.8 |
| Answer» C. 2.2 | |
| 6. |
Maleic anhydride is produced by catalytic oxidation of |
| A. | Toluene |
| B. | Ethyl alcohol |
| C. | Naphthalene |
| D. | Benzene |
| Answer» E. | |
| 7. |
Nitrile rubber is produced by the polymerisation of |
| A. | Acrylonitrile and butadiene |
| B. | Acrylonitrile and styrene |
| C. | Isobutylene and isoprene |
| D. | None of these |
| Answer» B. Acrylonitrile and styrene | |
| 8. |
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 | |
| 9. |
Which of the following is not present in bagasse fibre? |
| A. | Cellulose |
| B. | Lignin |
| C. | Pentogens |
| D. | None of these |
| Answer» E. | |
| 10. |
Acrylonitrile is mainly used in the __________ industry. |
| A. | Polymer |
| B. | Printing |
| C. | Dyeing |
| D. | Photographic |
| Answer» D. Photographic | |
| 11. |
Which of the following is not a product of coal tar distillation? |
| A. | Anthracene |
| B. | Creosote oil |
| C. | Carbolic oil |
| D. | None of these |
| Answer» E. | |
| 12. |
Viscose rayon is |
| A. | Cellulose nitrate |
| B. | Regenerated cellulose nitrate |
| C. | Regenerated cellulose acetate |
| D. | None of these |
| Answer» E. | |
| 13. |
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed: |
| A. | Furnace → converter → absorber |
| B. | Furnace → evaporator → absorber |
| C. | Furnace → converter → evaporator |
| D. | Converter → furnace → absorber |
| Answer» B. Furnace → evaporator → absorber | |
| 14. |
Low temperature carbonisation of coal takes place at __________ °C. |
| A. | 300 |
| B. | 1100 |
| C. | 700 |
| D. | 900 |
| Answer» D. 900 | |
| 15. |
Reaction of calcium carbide with water produces a gas, which is used |
| A. | As an illuminant |
| B. | For metal cutting/welding |
| C. | Both (A) & (B) |
| D. | Neither (A) nor (B) |
| Answer» D. Neither (A) nor (B) | |
| 16. |
Which of the following is an explosive? |
| A. | Nitro-glycerine |
| B. | Trinitrotoluene (TNT) |
| C. | Cellulose nitrate |
| D. | All (A), (B), and (C) |
| Answer» E. | |
| 17. |
Styrene (a monomer for the production of polystyrene) is commercially produced by |
| A. | Catalytic dehydrogenation of ethyl benzene |
| B. | Dehydration of ethyl alcohol followed by hydrogenation |
| C. | Reacting ethylene oxide with acetaldehyde |
| D. | Fermentation of starch |
| Answer» B. Dehydration of ethyl alcohol followed by hydrogenation | |
| 18. |
Nitric acid is not used in the manufacture of |
| A. | Detergents |
| B. | Fertilisers |
| C. | Aqua regia |
| D. | Explosives |
| Answer» B. Fertilisers | |
| 19. |
Carboxymethyl cellulose (CMC) is added in detergents to |
| A. | Prevent redeposition of soil on cleaned surface |
| B. | Act as optical brightening agent |
| C. | Inhibit corrosion in washing machines made of aluminium |
| D. | None of these |
| Answer» B. Act as optical brightening agent | |
| 20. |
Yellow phosphorus is transported under |
| A. | Air |
| B. | Water |
| C. | Nitrogen |
| D. | Helium |
| Answer» C. Nitrogen | |
| 21. |
Carborundum consists mainly of |
| A. | Bauxite |
| B. | Silicon carbide |
| C. | Boron carbide |
| D. | Calcium carbide |
| Answer» C. Boron carbide | |
| 22. |
The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2 /gm. |
| A. | 800 |
| B. | 1600 |
| C. | 4000 |
| D. | 8500 |
| Answer» C. 4000 | |
| 23. |
Soap cannot be used with hard water, because |
| A. | Hard water contains sulphate |
| B. | They form insoluble calcium soaps which precipitate |
| C. | They attract back the removed dirt |
| D. | None of these |
| Answer» C. They attract back the removed dirt | |
| 24. |
Phenolic antiseptics are added in the __________ soap |
| A. | Shaving |
| B. | Medicated |
| C. | Metallic |
| D. | Transparent |
| Answer» C. Metallic | |
| 25. |
Inversion of sucrose produces |
| A. | Fructose |
| B. | Glucose |
| C. | Both (A) & (B) |
| D. | Neither (A) nor (B) |
| Answer» C. Both (A) & (B) | |
| 26. |
Extraction of __________ employs an electrolytic process. |
| A. | Aluminium |
| B. | Silver |
| C. | Copper |
| D. | All (A), (B) and (C) |
| Answer» B. Silver | |
| 27. |
Direct conversion of chemical energy into electrical energy is done in a |
| A. | Magnetohydrodynamic (MHD) generator |
| B. | Fuel cell |
| C. | Fast breeder reactor |
| D. | None of these |
| Answer» C. Fast breeder reactor | |
| 28. |
Baking soda is chemically represented by |
| A. | Na2CO3 |
| B. | NaHCO3 |
| C. | Na2CO3.H2O |
| D. | Na2CO3.10H2O |
| Answer» C. Na2CO3.H2O | |
| 29. |
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. | P 2 |
| D. | 1/P |
| Answer» C. P 2 | |
| 30. |
Shaving soaps are |
| A. | Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property |
| B. | Metallic soaps compounded with frothing agents |
| C. | High free alkali soaps having excess of cane sugar and alcohol |
| D. | None of these |
| Answer» B. Metallic soaps compounded with frothing agents | |
| 31. |
Economics of 'Solvay Process' depends upon the efficiency of |
| A. | Carbonating tower |
| B. | Ammonia recovery |
| C. | Ammonia recovery and size of the plant |
| D. | Ammoniation of salt solution |
| Answer» D. Ammoniation of salt solution | |