| Objective General Knowledge |
| Q. | Which of the following is the hardest metal? | | | 1 | Gold | | | 2 | Iron | | | 3 | Platinum | | | 4 | Tungsten | | | Ans:2 |
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| Q. | Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be | | | 1 | At a higher level in water | | | 2 | At a higher level in alcohol | | | 3 | At the same level in both | | | 4 | Floating in alcohol and sinking in water | | | Ans:4 |
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| Q. | After long periods of use, a gray spot develops on the inside of a bulb. This is because | | | 1 | The tungsten filament evaporates and collects there | | | 2 | The heat of the bulb scorches the glass at the top | | | 3 | Dust inside the bulb condenses on the top | | | 4 | Glass undergoes a change due to the heat | | | Ans:1 |
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| Q. | The temperature which has the same reading on both Fahrenheit and Celsius scales is | | | 1 | 40° | | | 2 | -40° | | | 3 | -34° | | | 4 | -140° | | | Ans:2 |
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| Q. | Select the one which is not a mixture. | | | 1 | Air | | | 2 | Gasoline | | | 3 | LPG | | | 4 | Distilled water | | | Ans:4 |
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| Q. | Refrigerators keep food unspoiled because | | | 1 | at its low temperature, bacteria and moulds are inactive | | | 2 | at its low temperature, the germs are killed | | | 3 | at its low temperature, the germs are frozen | | | 4 | it sterilises the food | | | Ans:1 |
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| Q. | Water boils at a lower temperature on the hills because | | | 1 | it is cold on the hills | | | 2 | there is less carbon dioxide on the hills | | | 3 | there is a decrease in air pressure on the hills | | | 4 | there is less oxygen | | | Ans:3 |
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| Q. | An air-conditioning system regulates | | | 1 | Temperature | | | 2 | Humidity | | | 3 | Air velocity | | | 4 | All of these | | | Ans:3 |
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| Q. | The force that causes a spring to eventually return to its normal length is called | | | 1 | Potential force | | | 2 | Gravitational force | | | 3 | Spring force | | | 4 | Restoring force | | | Ans:4 |
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| Q. | Echoes are due to | | | 1 | Refraction of sound waves | | | 2 | Polarisation of sound waves | | | 3 | Diffraction of sound waves | | | 4 | Reflection of sound waves | | | Ans:4 |
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