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प्रश्न
Explain why air is used to inflate tyres.
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उत्तर
Air is used to inflate tyres because air can take the shape of any substance that it is pushed into, as there are large inter-molecular spaces present in air. Thus, when air is filled in a tyre, its particles distribute themselves evenly by diffusion inside the tyre, giving it a proper balance. Liquid can be filled in a tyre but it will exert more pressure than the atmospheric pressure and there will be chances of tyre getting burst. Besides, it will unnecessarily increase the weight of the vehicle.
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संबंधित प्रश्न
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A kind of matter which can sublime is
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Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
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- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
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Name the property which enables metals to be drawn into wires.
Name a metal which forms amalgams.
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
Define solvent.
What is a colloid ? Give two examples of colloids (or colloidal solutions)
Which of the following is not an emulsion ?
What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
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Explain the meaning of the term matter with special reference to the term ‘substance’.
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Gas-solid is ______.
Examples of foam are ______.
Define the term matter.
