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Why does our palm feel cold when we put ...

Why does our palm feel cold when we put some acetone or petrol or perfume on it?

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Acetone, petrol, and perfume evaporate at low temperatures. When some acetone, petrol, or perfume is dropped on the palm, it takes heat from the palm and evaporates, thereby making the palm cooler
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NCERT ENGLISH-MATTER IN OUR SURROUNDINGS-Exercise
  1. Give reasons (a) A gas fills completely the vessel in which it is ke...

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  2. Liquids generally have lower density as compared to solids but you mus...

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  3. Convert the following temperatures to the celsius scale. (a) 300k (...

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  4. What is the physical state of water at: a. 250^(@)C b. 100^(@)C?

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  5. For any substance, why does the temperature remains constant during th...

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  6. Suggest a method to liquefy atmospheric gases.

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  7. Why does a desert cooler cool better on a hot dry day?

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  8. How does the water kept in an earthen pot (mataka) become cool during ...

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  9. Why does our palm feel cold when we put some acetone or petrol or per...

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  10. Why are we able to sip hot tea or milk faster from a saucer rather tha...

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  11. What type of clothes should we wear in summer?

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  12. Convert the following temperatures to the celsius scale. (a) 293k (...

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  13. Convert the folowing temperature to the kelvin scale. (a) 25^(@)C (b...

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  14. Give reason for the following observations. (a) Naphthalene balls d...

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  15. Arrange the following substances in increasing order of forces of attr...

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  16. What is the physical state of water at- (a) 25^(@) (b) 0^(@)C (c) 1...

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  17. Give two reasons to justify- (a) Water at room temperaure is a liqui...

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  18. Why is ice at 273k more effective in cooling than water at the same te...

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  19. What produces more severe burns, boiling water or steam?

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  20. Name A,B,C,D,E and F in the followng diagram showing change in its sta...

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