Question

Why does our Palm feel cold when we put some petrol or perfume​

Answer 1

it converts into vapour at a fast rate. this increases the liquid molecules around it in vapour phase thus our palm feel cold. acetone,petrol or perfume has very low boiling temperature. when we put some acetone on our palm the particles of it gain energy from our palm and evaporate quickly which causes cooling .

Answer 2

The particles gain energy from your palm or surrounding and evaporate causing the palm to feel cool.