Question

On heating the white sugar in a frying pan, it gradually changes to brown and then black. what kind of change is it - physical or chemical ? Give reason for your answer.

Answer 1

it's a chemical change because sugar reacts with the heat energy.

Answer 2

It is a chemical reaction.

Sugar is made of carbon, hydrogen and oxygen atoms. When heated over a candle, these elements react with the fire to turn into a liquid. The heat causes the sugar's atoms to combine with the oxygen in the air, forming new groups of atoms. Energy is released in this chemical reaction in the form of smoke and black soot.

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