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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 produces more severe burns, boiling water or steam?
What is evaporation?
Water in a dish evaporates faster than in a bottle. Give reason.
Explain why in hot summer days water remains cool in earthen pots.
Define the following terms Condensation
Why does our palm feel cold when we put some acetone (or perfume) on it ?
How will you demonstrate that water vapour is present in air ?
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:
Rate of evaporation of an aqueous solution decreases with increase in humidity.
