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. |
_Potassium nitrate is used in$? |
| A. | Medicine |
| B. | Fertilizer |
| C. | Salt |
| D. | Glass |
| Answer» C. Salt | |
| 2. |
_The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is$? |
| A. | Argon |
| B. | Xenon |
| C. | Helium |
| D. | Krypton |
| Answer» D. Krypton | |
| 3. |
_When an iron nail gets rusted, iron oxide is formed$? |
| A. | Without any change in the weight of the nail |
| B. | With decrease in the weight of the nail |
| C. | With increase in the weight of the nail |
| D. | Without any change in colour or weight of the nail |
| Answer» D. Without any change in colour or weight of the nail | |
| 4. |
_Chemical formula for water is$? |
| A. | NaA1O2 |
| B. | H2O |
| C. | Al2O3 |
| D. | CaSiO3 |
| Answer» C. Al2O3 | |
| 5. |
_Bromine is a$? |
| A. | Black Solid |
| B. | Red Liquid |
| C. | Colourless Gas |
| D. | Highly Inflammable Gas |
| Answer» C. Colourless Gas | |
| 6. |
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?$? |
| A. | Television |
| B. | Refrigerator |
| C. | Tube light |
| D. | Cooking gas |
| Answer» C. Tube light | |
| 7. |
In fireworks, the green flame is produced because of$? |
| A. | Sodium |
| B. | Barium |
| C. | Mercury |
| D. | Potassium |
| Answer» C. Mercury | |
| 8. |
Decibel is the unit for$? |
| A. | Speed of light |
| B. | Radio wave frequency |
| C. | Intensity of sound |
| D. | Intensity of heat |
| Answer» D. Intensity of heat | |
| 9. |
Which of the following metals remain in liquid for under normal conditions?$? |
| A. | Radium |
| B. | Zinc |
| C. | Uranium |
| D. | Mercury |
| Answer» E. | |
| 10. |
Water is a good solvent of ionic salts because:$? |
| A. | It has a high specific heat |
| B. | It has no colour |
| C. | It has a high dipole moment |
| D. | It has a high boiling point |
| Answer» D. It has a high boiling point | |
| 11. |
What cause a moving body to resist a change in its state of motion?$? |
| A. | Displacement |
| B. | Acceleration |
| C. | Inertia |
| D. | Velocity |
| Answer» D. Velocity | |
| 12. |
Which layer protects earth from harmful rays of the Sun?$? |
| A. | Ionosphere |
| B. | Ozone layer |
| C. | Troposphere |
| D. | Magnetosphere |
| Answer» C. Troposphere | |
| 13. |
How does common salt help in separating soap from the solution after saponification?$? |
| A. | By decreasing density of Soap |
| B. | By decreasing solubility of Soap |
| C. | By increasing density of Soap |
| D. | By increasing solubility of Soap |
| Answer» C. By increasing density of Soap | |
| 14. |
Paper is manufactured by$? |
| A. | Wood and resin |
| B. | Wood, sodium and bleaching powder |
| C. | Wood, calcium, hydrogen sulphide and resin. |
| D. | Wood and bleaching powder |
| Answer» D. Wood and bleaching powder | |
| 15. |
Electric bulb filament is made of$? |
| A. | Copper |
| B. | Aluminum |
| C. | Lead |
| D. | Tungsten |
| Answer» E. | |
| 16. |
Which of the following metals forms an amalgam with other metals?$? |
| A. | Tin |
| B. | Mercury |
| C. | Lead |
| D. | Zinc |
| Answer» C. Lead | |
| 17. |
Which of the gas is not known as green house gas?$? |
| A. | Methane |
| B. | Nitrous oxide |
| C. | Carbon dioxide |
| D. | Hydrogen |
| Answer» E. | |
| 18. |
Which of the following is used as a lubricant?$? |
| A. | Graphite |
| B. | Silica |
| C. | Iron Oxide |
| D. | Diamond |
| Answer» B. Silica | |
| 19. |
The average salinity of sea water is$? |
| A. | 3% |
| B. | 3.5% |
| C. | 2.5% |
| D. | 2% |
| Answer» C. 2.5% | |
| 20. |
Heavy water is:$? |
| A. | Deuterium oxide |
| B. | PH7 |
| C. | Rain water |
| D. | Tritium oxide |
| Answer» B. PH7 | |
| 21. |
Carbon, diamond and graphite are together called:$? |
| A. | Allotrope |
| B. | Isomers |
| C. | Isomorphs |
| D. | Isotopes |
| Answer» B. Isomers | |
| 22. |
Most soluble in water is:$? |
| A. | Camphor |
| B. | Sulphur |
| C. | Common salt |
| D. | Sugar |
| Answer» E. | |
| 23. |
From which mineral is radium obtained?$? |
| A. | Rutile |
| B. | Haematite |
| C. | Limestone |
| D. | Pitchblende |
| Answer» E. | |
| 24. |
Wood is the main raw material for the manufacture of$? |
| A. | Paint |
| B. | Paper |
| C. | Ink |
| D. | Gun powder |
| Answer» C. Ink | |
| 25. |
What is the wavelength of visible spectrum?$? |
| A. | 8500 - 9800 angstrom |
| B. | 7800 - 8000 angstrom |
| C. | 3900 - 7600 angstrom |
| D. | 1300 - 3000 angstrom |
| Answer» D. 1300 - 3000 angstrom | |
| 26. |
The dark lines in the solar spectrum are due to$? |
| A. | Absorption of corresponding wavelengths by the outer layers of the sun. |
| B. | Destructive interference between waves of certain definite wavelengths. |
| C. | Absorption of corresponding wavelengths by the prism used in the photograph. |
| D. | Absence of corresponding wavelengths from the light emitted by the core of the sun. |
| Answer» B. Destructive interference between waves of certain definite wavelengths. | |
| 27. |
Nuclear fission is caused by the impact of:$? |
| A. | Neutron |
| B. | Proton |
| C. | Deuteron |
| D. | Electron |
| Answer» B. Proton | |
| 28. |
Which of the following is commonly called a 'poly-amide'?$? |
| A. | Terylene |
| B. | Nylon |
| C. | Rayon |
| D. | Orlon |
| Answer» C. Rayon | |
| 29. |
One Joule is equal to$? |
| A. | 105 ergs |
| B. | 103 ergs |
| C. | 107 ergs |
| D. | 1011 ergs |
| Answer» D. 1011 ergs | |
| 30. |
Knot is a unit of speed of which of the following?$? |
| A. | Aeroplane |
| B. | Light waves |
| C. | Ship |
| D. | Sound waves |
| Answer» D. Sound waves | |
| 31. |
Isotopes are separated by:$? |
| A. | Crystallisation |
| B. | Sublimation |
| C. | Distillation |
| D. | Filtration |
| Answer» D. Filtration | |
| 32. |
One Joule is equal to? |
| A. | 105 ergs |
| B. | 103 ergs |
| C. | 107 ergs |
| D. | 1011 ergs |
| Answer» D. 1011 ergs | |
| 33. |
Paper is manufactured by? |
| A. | Wood and resin |
| B. | Wood, sodium and bleaching powder |
| C. | Wood, calcium, hydrogen sulphide and resin. |
| D. | Wood and bleaching powder |
| Answer» D. Wood and bleaching powder | |
| 34. |
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 | |
| 35. |
Which layer protects earth from harmful rays of the Sun?? |
| A. | Ionosphere |
| B. | Ozone layer |
| C. | Troposphere |
| D. | Magnetosphere |
| Answer» C. Troposphere | |
| 36. |
What cause a moving body to resist a change in its state of motion?? |
| A. | Displacement |
| B. | Acceleration |
| C. | Inertia |
| D. | Velocity |
| Answer» D. Velocity | |
| 37. |
Which of the following is commonly called a 'poly-amide'?? |
| A. | Terylene |
| B. | Nylon |
| C. | Rayon |
| D. | Orlon |
| Answer» C. Rayon | |
| 38. |
Nuclear fission is caused by the impact of:? |
| A. | Neutron |
| B. | Proton |
| C. | Deuteron |
| D. | Electron |
| Answer» B. Proton | |
| 39. |
Wood is the main raw material for the manufacture of? |
| A. | Paint |
| B. | Paper |
| C. | Ink |
| D. | Gun powder |
| Answer» C. Ink | |
| 40. |
Isotopes are separated by:? |
| A. | Crystallisation |
| B. | Sublimation |
| C. | Distillation |
| D. | Filtration |
| Answer» D. Filtration | |
| 41. |
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 | |
| 42. |
The dark lines in the solar spectrum are due to? |
| A. | Absorption of corresponding wavelengths by the outer layers of the sun. |
| B. | Destructive interference between waves of certain definite wavelengths. |
| C. | Absorption of corresponding wavelengths by the prism used in the photograph. |
| D. | Absence of corresponding wavelengths from the light emitted by the core of the sun. |
| Answer» B. Destructive interference between waves of certain definite wavelengths. | |
| 43. |
What is the wavelength of visible spectrum?? |
| A. | 8500 - 9800 angstrom |
| B. | 7800 - 8000 angstrom |
| C. | 3900 - 7600 angstrom |
| D. | 1300 - 3000 angstrom |
| Answer» D. 1300 - 3000 angstrom | |
| 44. |
Electric bulb filament is made of? |
| A. | Copper |
| B. | Aluminum |
| C. | Lead |
| D. | Tungsten |
| Answer» E. | |
| 45. |
Very small time intervals are accurately measure by? |
| A. | White dwarfs |
| B. | Quartz clocks |
| C. | Atomic clocks |
| D. | Pulsars |
| Answer» D. Pulsars | |
| 46. |
Most soluble in water is:? |
| A. | Camphor |
| B. | Sulphur |
| C. | Common salt |
| D. | Sugar |
| Answer» E. | |
| 47. |
From which mineral is radium obtained?? |
| A. | Rutile |
| B. | Haematite |
| C. | Limestone |
| D. | Pitchblende |
| Answer» E. | |
| 48. |
Heavy water is:? |
| A. | Deuterium oxide |
| B. | PH7 |
| C. | Rain water |
| D. | Tritium oxide |
| Answer» B. PH7 | |
| 49. |
Carbon, diamond and graphite are together called:? |
| A. | Allotrope |
| B. | Isomers |
| C. | Isomorphs |
| D. | Isotopes |
| Answer» B. Isomers | |
| 50. |
Which of the following is used as a lubricant?? |
| A. | Graphite |
| B. | Silica |
| C. | Iron Oxide |
| D. | Diamond |
| Answer» B. Silica | |