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A physical change is a temporary change that can be reversed. For example, melting of ice, evaporation of water, melting of wax and glowing of a bulb are physical changes as they give us back the original substance.
Original material remains same. These changes are in the state of matter and can be reversed easily.
A chemical change is a permanent change that cannot be reversed. For example, burning of paper, burning of matchsticks, cooking of food and formation of curd from milk are chemical changes.
We cannot get original things back when a chemical change occurs in them. A chemical change results from a chemical reaction.