MCQOPTIONS
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MCQOPTIONS
This section includes 108 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Amalgams are |
| A. | highly coloured alloys |
| B. | alloys which contain mercury as one of the contents |
| C. | alloys which have great resistance to abrasion |
| D. | alloys which contain carbon |
| Answer» C. alloys which have great resistance to abrasion | |
| 2. |
Bromine is a |
| A. | black solid |
| B. | red liquid |
| C. | colourless gas |
| D. | highly inflammable gas |
| Answer» C. colourless gas | |
| 3. |
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is |
| A. | Argon |
| B. | Xenon |
| C. | Helium |
| D. | Krypton |
| Answer» D. Krypton | |
| 4. |
The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of |
| A. | bromine |
| B. | fluorine |
| C. | chlorine |
| D. | sulphur |
| Answer» E. | |
| 5. |
The element common to all acids is |
| A. | hydrogen |
| B. | carbon |
| C. | sulphur |
| D. | oxygen |
| Answer» B. carbon | |
| 6. |
Tetraethyl lead is used as |
| A. | pain killer |
| B. | fire extinguisher |
| C. | mosquito repellent |
| D. | petrol additive |
| Answer» E. | |
| 7. |
The hardest substance available on earth is |
| A. | Gold |
| B. | Iron |
| C. | Diamond |
| D. | Platinum |
| Answer» D. Platinum | |
| 8. |
Which of the following is used as a lubricant? |
| A. | Graphite |
| B. | Silica |
| C. | Iron Oxide |
| D. | Diamond |
| Answer» B. Silica | |
| 9. |
The property of a substance to absorb moisture from the air on exposure is called |
| A. | osmosis |
| B. | deliquescence |
| C. | efflorescence |
| D. | desiccation |
| Answer» C. efflorescence | |
| 10. |
In which of the following activities silicon carbide is used? |
| A. | Making cement and glass |
| B. | Disinfecting water of ponds |
| C. | cutting very hard substances |
| D. | Making casts for statues |
| Answer» D. Making casts for statues | |
| 11. |
The variety of coal in which the deposit contains recognisable traces of the original plant material is |
| A. | bitumen |
| B. | anthracite |
| C. | lignite |
| D. | peat |
| Answer» E. | |
| 12. |
The gas usually filled in the electric bulb is |
| A. | nitrogen |
| B. | hydrogen |
| C. | carbon dioxide |
| D. | oxygen |
| Answer» B. hydrogen | |
| 13. |
Quartz crystals normally used in quartz clocks etc. is chemically |
| A. | silicon dioxide |
| B. | germanium oxide |
| C. | a mixture of germanium oxide and silicon dioxide |
| D. | sodium silicate |
| Answer» B. germanium oxide | |
| 14. |
What is the unit for measuring the amplitude of a sound? |
| A. | Decibel |
| B. | Coulomb |
| C. | Hum |
| D. | Cycles |
| Answer» B. Coulomb | |
| 15. |
Decibel is the unit for |
| A. | speed of light |
| B. | radio wave frequency |
| C. | intensity of sound |
| D. | intensity of heat |
| Answer» D. intensity of heat | |
| 16. |
Which type of fire extinguisher is used for petroleum fire? |
| A. | Powder type |
| B. | Liquid type |
| C. | Soda acid type |
| D. | Foam type |
| Answer» B. Liquid type | |
| 17. |
Which of the following is commonly called a 'polyamide'? |
| A. | Terylene |
| B. | Nylon |
| C. | Rayon |
| D. | Orlon |
| Answer» C. Rayon | |
| 18. |
Which of the following is used as a moderator in nuclear reactor? |
| A. | Thorium |
| B. | Graphite |
| C. | Radium |
| D. | Ordinary water |
| Answer» C. Radium | |
| 19. |
'No two electrons in an atom can have the same set of four quantum numbers' is |
| A. | Newton's law |
| B. | Bohr's law |
| C. | Aufbau principle |
| D. | Pauli's exclusion principle |
| Answer» E. | |
| 20. |
Fathom is the unit of |
| A. | sound |
| B. | depth |
| C. | frequency |
| D. | distance |
| Answer» C. frequency | |
| 21. |
Which of the following rays are more penetrating? |
| A. | Beta rays |
| B. | Alpha rays |
| C. | Gamma rays |
| D. | X-rays |
| Answer» D. X-rays | |
| 22. |
How many colours the sunlight spectrum has? |
| A. | Three |
| B. | Seven |
| C. | Four |
| D. | Five |
| Answer» C. Four | |
| 23. |
In an atomic nucleus, neutrons and protons are held together by |
| A. | gravitational forces |
| B. | exchange forces |
| C. | coulombic forces |
| D. | magnetic forces |
| Answer» C. coulombic forces | |
| 24. |
According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ . |
| A. | a molecule |
| B. | a cation |
| C. | an anion |
| D. | an atom |
| Answer» B. a cation | |
| 25. |
Atoms of an element differ from those of all other elements in |
| A. | atomic number and electronic configuration |
| B. | number of neutrons and number of valence electrons |
| C. | atomic number and number of valence electrons |
| D. | number of neutrons and electronic configuration |
| Answer» B. number of neutrons and number of valence electrons | |
| 26. |
Nuclear fission is caused by the impact of |
| A. | neutron |
| B. | proton |
| C. | deuteron |
| D. | electron |
| Answer» B. proton | |
| 27. |
The isotope of uranium capable of sustaining chain reaction is |
| A. | U-235 |
| B. | U-245 |
| C. | U-239 |
| D. | U-238 |
| Answer» B. U-245 | |
| 28. |
Glass is made of the mixture of |
| A. | quartz and mica |
| B. | sand and silicates |
| C. | salt and quartz |
| D. | sand and salt |
| Answer» C. salt and quartz | |
| 29. |
What are the soaps? |
| A. | Salts of silicates |
| B. | Mixture of glycerol and alcohols |
| C. | Sodium or potassium salts of heavier fatty acids |
| D. | Esters of heavy fatty acids |
| Answer» D. Esters of heavy fatty acids | |
| 30. |
Very small time intervals are accurately measure by |
| A. | White dwarfs |
| B. | Quartz clocks |
| C. | Atomic clocks |
| D. | Pulsars |
| Answer» D. Pulsars | |
| 31. |
One kilometre is equal to how many miles? |
| A. | 0.84 |
| B. | 0.5 |
| C. | 1.6 |
| D. | 0.62 |
| Answer» E. | |
| 32. |
Nautical mile is a unit of distance used in |
| A. | navigation |
| B. | road mile |
| C. | astronomy |
| D. | measuring the boundaries of a nation |
| Answer» B. road mile | |
| 33. |
Light year is a measurement of |
| A. | speed of aeroplanes |
| B. | speed of light |
| C. | Stellar distances |
| D. | speed of rockets |
| Answer» D. speed of rockets | |
| 34. |
The major ingredient of leather is |
| A. | collagen |
| B. | carbohydrate |
| C. | polymer |
| D. | nucleic acid |
| Answer» B. carbohydrate | |
| 35. |
Paper is manufactured by |
| A. | Wood and resin |
| B. | Wood, sodium and bleaching powder |
| C. | Wood, calcium, hydrogen sulphite and resin |
| D. | Wood and bleaching powder |
| Answer» D. Wood and bleaching powder | |
| 36. |
Gypsum is added to cement clinker to |
| A. | increase the tensile strength of cement |
| B. | decrease the rate of setting of cement |
| C. | facilitate the formation of colloidal gel |
| D. | bind the particles of calcium silicate |
| Answer» C. facilitate the formation of colloidal gel | |
| 37. |
The vast resources of unutilised natural gas can be used in the production of |
| A. | graphite |
| B. | Synthetic petroleum |
| C. | fertilisers |
| D. | carbide |
| Answer» D. carbide | |
| 38. |
Soap is a mixture of sodium or potassium salts of |
| A. | dicarboxylic acids |
| B. | monocarboxylic acids |
| C. | glycerol |
| D. | tricarboxylic acids |
| Answer» C. glycerol | |
| 39. |
In vulcanisation, natural rubber is heated with |
| A. | Carbon |
| B. | Silicon |
| C. | Sulphur |
| D. | Phosphorous |
| Answer» D. Phosphorous | |
| 40. |
How does common salt help in separating soap from the solution after saponification? |
| A. | By decreasing density of Soap |
| B. | By decreasing solubility of Soap |
| C. | By increasing density of Soap |
| D. | By increasing solubility of Soap |
| Answer» C. By increasing density of Soap | |
| 41. |
Deep blue colour is imparted to glass by the presence of |
| A. | cupric oxide |
| B. | nickel oxide |
| C. | cobalt oxide |
| D. | iron oxide |
| Answer» D. iron oxide | |
| 42. |
Which of the following is used for removing air bubbles from glass during its manufacture? |
| A. | Arsenous oxide |
| B. | Potassium carbonate |
| C. | Soda ash |
| D. | Feldspar |
| Answer» B. Potassium carbonate | |
| 43. |
Rayon is chemically |
| A. | cellulose |
| B. | pectin |
| C. | glucose |
| D. | amylase |
| Answer» B. pectin | |
| 44. |
Which of the following is a protein? |
| A. | Natural rubber |
| B. | Starch |
| C. | Cellulose |
| D. | None of these |
| Answer» B. Starch | |
| 45. |
Wood is the main raw material for the manufacture of |
| A. | paint |
| B. | paper |
| C. | ink |
| D. | gun powder |
| Answer» C. ink | |
| 46. |
Optic fibres are mainly used for which of the following? |
| A. | Musical instruments |
| B. | Food industry |
| C. | Weaving |
| D. | Communication |
| Answer» E. | |
| 47. |
A chronometer measures |
| A. | colour contrast |
| B. | sound waves |
| C. | time |
| D. | water waves |
| Answer» D. water waves | |
| 48. |
Electric current is measure by |
| A. | commutator |
| B. | anemometer |
| C. | ammeter |
| D. | voltmeter |
| Answer» D. voltmeter | |
| 49. |
Knot is a unit of speed of which of the following? |
| A. | Aeroplane |
| B. | Light waves |
| C. | Ship |
| D. | Sound waves |
| Answer» D. Sound waves | |
| 50. |
Kilowatt is a unit to measure |
| A. | work |
| B. | power |
| C. | electricity |
| D. | current |
| Answer» C. electricity | |