InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Name the following:Any three substances found in solid state. |
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Answer» Iron, copper, aluminium, wood |
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| 2. |
………… batteries produce electricity using sunlight (a) Water (b) Solar (c) Tidal |
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Answer» Correct option is (b) Solar |
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| 3. |
Why should we make a habit of using minimum amount of electricity? |
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Answer» In any method of electricity generation, resources from the environment have to be used. Hence, we should make a habit to conserve electricity |
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| 4. |
Electricity is also a form of ………….(a) machine (b) energy (c) heat |
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Answer» Correct option is (b) energy |
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| 5. |
Stores of coal and mineral oil on earth are (a) unlimited (b) limited (c) plenty |
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Answer» Correct option is (b) limited |
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| 6. |
What are solar batteries? |
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Answer» Batteries which produce electricity using sunlight are called solar batteries. |
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| 7. |
There is a car. Its tank is full of fuel, but it does not move. Why is that? |
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Answer» The energy has to be released from the fuel to make the car move. The energy is released when the petrol burns. The petrol starts burning only after we turn on the car engine. Since the engine is not on, the car does not move even when its tank is full of fuel. |
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| 8. |
In a solar cooker …………………. energy is used. (a) solar (b) electricity (c) L.P.G |
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Answer» (a) Solar Energy is used The cooking pan used in solar cookers convert light energy to heat energy Correct option is (a) solar |
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| 9. |
Plants use……. to prepare their food. (a) LPG (b) induction (c) sunlight |
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Answer» Correct option is (c) sunlight |
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| 10. |
We use ……………. to run the T.V. (a) wires (b) plugs (c) electricity |
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Answer» Correct option is (c) electricity |
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| 11. |
What change do you see in the chalk? |
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Answer» The chalk becomes smaller in size, after writing. |
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| 12. |
Machines can be run using ……………. (a) energy (b) fuels (c) water |
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Answer» Correct option is (b) fuels |
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| 13. |
When we have run a long distance, we feel tired. We have to stop. Why is that? |
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Answer» We need energy to run. Hence when we run a long distance, the food present in the body is continuously burn to release energy. This energy is used to do the work of running. After running a long distance the food gets exhausted and the energy released decreases and therefore we feel tired and we stop. |
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| 14. |
What uses of heat energy do we see in our daily life? |
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Answer» We use heat energy to cook food, to heat water, to press our clothes, to keep us warm during cold winters in areas where temperature is very low, etc. |
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| 15. |
How do we save fuel by using public transport? |
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Answer» If people drive car instead of using public transport while going to work, more fuel will be burnt, as each car will burn the fuel to release energy and work. However if public transport is used. We need to use fuel, only for one transport vehicle. Hence it will save a lot of fuel if people use the public transport. |
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| 16. |
When and why do clothes smell of naphthalene? |
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Answer» The naphthalene balls are continuously converted into small particles in the gaseous state. These particles settle down on the clothes in which they are kept. Therefore if naphthalene balls are kept for a long time in the clothes, they smell of naphthalene due to these particles. |
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| 17. |
How do we save fuel by using public transport ? |
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Answer» Each automobile vehicle needs fuel either in the form of petrol, diesel, or CNG. If all the people use a separate vehicle, the amount of fuel consumed would be much more. If many people start using public transport, fuel consumption would be reduced. A single bus or a train can carry many people and thus it can save lots of fuel. |
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| 18. |
Naphthalene balls which are kept open are continuously converted to small particles in the …… state.(a) liquid (b) solid (c) gaseous |
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Answer» Correct option is (c) gaseous |
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| 19. |
When iron or copper is made smooth with a file, we get …………….. of iron or copper. (a) particles(b) soil (c) saudust |
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Answer» Correct option is (a) particles |
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| 20. |
In which states is water found in nature? |
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Answer» Water is found in all three states in nature, solid, liquid and gaseous state. Ice is the solid state of water. Water in lakes, sea etc. are in liquid state and steam or vapour is the gaseous state of water. |
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| 21. |
Liquids are also made of small……. (a) droplets (b) particles (c) dust |
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Answer» Correct option is (b) particles |
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| 22. |
…………… is found in three states – solid, liquid and gaseous. (a) Mineral oil (b) Carbon (c) Water |
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Answer» Correct option is (c) Water |
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| 23. |
…………… is required to do work. (a) Energy (b) Strength (c) Health |
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Answer» Correct option is (a) Energy |
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| 24. |
Name the following:Three substances found in liquid state. |
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Answer» Water, milk, cough syrup. |
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| 25. |
Name the following:Substances which goes into gaseous state directly from solid state. |
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Answer» Naphthalene balls This type of reaction is known as sublimation reaction. Ex. Dry ice |
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| 26. |
Different substances have different ………….. (a) material (b) properties (c) code |
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Answer» Correct option is (b) properties |
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| 27. |
Name the following:Properties of substances. |
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Answer» Transparency, hardness, colour, smell, solubility in water. |
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| 28. |
Name the following:Three substances found in gaseous state. |
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Answer» Naphthalene balls, iodine crystals |
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| 29. |
Energy obtained by breaking the tiniest particle of a substance is called … (a) solar (b) atomic (c) kinetic |
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Answer» Correct option is (b) atomic |
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| 30. |
Energy obtained from sun is called …………… energy (a) lunar (b) solar (c) tidal |
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Answer» Correct option is (b) solar |
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| 31. |
Name the following:Forms of energy. |
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Answer» Sound, heat, light, electricity. |
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| 32. |
Name the following:Fuels used for running machines. |
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Answer» LPG, CNG, coal, diesel, petrol. |
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| 33. |
What are all subtances made up of? |
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Answer» All substances are made up of fine particles. |
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| 34. |
Name the following:Examples of kinetic energy. |
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Answer» Moving wind mill, sailing boats, running water, moving car etc. |
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| 35. |
Name the following:(i) Main source of energy used by us.(ii) Energy sources which do not cause pollution |
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Answer» (i) Electricity (ii) Wind energy, solar energy. |
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| 36. |
What is meant by energy? Name the sources of energy |
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Answer» The capacity of a body to do work is called energy. Energy is obtained by burning fuel is in the form of heat. This heat is used to do work. The sources of energy are the sun, coal, diesel, CNG, LPG, petrol, wind, moving water and electricity |
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| 37. |
Sunlight, wind and water are …………. sources of energy (a) exhaustible? (b) depleting (c) non-exhaustible |
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Answer» Correct option is (c) non-exhaustible |
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| 38. |
What is meant by energy? |
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Answer» The capacity to do the work is called energy. |
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| 39. |
All substances we see around us are made up of very tiny ……… (a) dust(b) particles (c) mud |
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Answer» Correct option is (b) particles |
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| 40. |
What is ‘energy? |
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Answer» The capacity of a body to do work is called energy |
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| 41. |
What are the different properties of substance? |
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Answer» Different substances have different properties, like hardness, transparency, colour, smell, solubility in water etc. |
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| 42. |
How is energy released? |
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Answer» When petrol or diesel burns in a motor vehicle, energy gets released. |
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| 43. |
Which substance is found in all three states? |
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Answer» Water is found in all three states – solid, liquid and gaseous. |
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| 44. |
…………….. of particles of any substance must come together to form a particle that can be visible to our eyes. (a) Lakhs (b) Thousands (c) Hundreds |
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Answer» Correct option is (a) Lakhs |
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| 45. |
In nature, every substance occurs in a………… state. (a) special (b) specific (c) partial |
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Answer» Correct option is (b) specific |
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| 46. |
Kerosene and petrol are in ……(a) solid (b) liquid (c) gaseous |
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Answer» Correct option is (b) liquid |
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| 47. |
Stores of …………….. and ……. which are used as fuels, on earth are limited. (a) mineral oil (b) uranium (c) coal |
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Answer» Correct option is (a) mineral oil, (c) coal |
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| 48. |
Nitrogen and Oxygen are in … ………….state. (a) solid (b) liquid (c) gaseous |
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Answer» Correct option is (c) gaseous |
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| 49. |
Aluminium and coal are is. ………. state. (a) solid (b) liquid (c) gaseous |
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Answer» Correct option is (a) solid |
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| 50. |
Energy in the form of motion is called ……… energy. (a) Kinesthetic (b) Kinetic (c) Solar |
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Answer» Correct option is (b) Kinetic |
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