Question

plz answer its urgent​

Answer 1

Our palm will feel cool. Acetone, perfume and petrol has very low boiling point... hence when it comes in contact with our palm it's molecules gets heated by our body temperature causing random motion of the particles. This causes the cooling effect.

(hope it helps)

Answer 2

Hey!

Our palm feels cool when we put some acetone or petrol or perfume on it because such substances are volatile liquids. When kept on palm, their particles gain energy (heat) from the palm or surroundings and evaporate causing the palm to feel cool.

Hope this helps ✌✌