Question

After some times sugar turns black. What
happens
to sugar?​

Answer 1

Answer:

So the sugar turns to caramel. Yes, it is a thermal decomposition reaction. The black stuff you see is mainly carbon. There will be some water vapour released.

Answer 2

Answer:

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.

Explanation:

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