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प्रश्न
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
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उत्तर
- When we put some acetone or petrol or perfume on our palm, it evaporates.
- During evaporation, particles of the liquid absorb energy from the surrounding or the surface of the palm to compensate for the loss of energy, making the surroundings cool.
- Hence, our palm feels cold when we put some acetone or petrol or perfume on it.
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संबंधित प्रश्न
What type of clothes should we wear in summer?
What is evaporation?
Why is cooling produced on evaporation of a liquid?
Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.
Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it? Give reasons for your answer.
How does the water kept in an earthen pot (matka) become cold during summer ?
Why are we able to sip hot tea or milk faster from a saucer rather than from a cup ?
What is evaporation ? State the various factors which affect evaporation.
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
Comment on the following statements:
Evaporation produces cooling.
