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Which is an example of a chemical reaction?
paper folded into tiny pieces
paper burned and turned into smoke
paper soaked in water
paper shredded and turned into pulp
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Paper burned and turned into smoke.
Burning (combustion) changes the paper into new substances — ash, smoke and gases — so bonds are broken and formed (a chemical reaction). The others are physical changes.
Burning (combustion) changes the paper into new substances — ash, smoke and gases — so bonds are broken and formed (a chemical reaction). The others are physical changes.
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