A piece of cloth is soaked in kerosene and another piece in water. When both are lighted with a match stick, which one will burn easily? Why?
Why can a piece of chalk be broken easily into smaller pieces while a coal piece cannot be broken easily ?
A thermometer shows a certain temperature on its scale. When its bulb is covered with a piece of cloth, soaked in spirit, it is observed that the reading of the thermometer decreases. Give reason for this observation.
an inflated baloon is rubbed with a piece of nylon cloth, then pressed it to the wall , it will stick. why it is happened