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3 votes
Which of the following is a chemical reaction?

1.Freezing liquid Mercury
2.Filling a balloon with air
3.Cutting a piece of paper into two pieces
4.Dropping a sliced orange into a vat of Sodium Dydroxide

1 Answer

3 votes

Answer:

option 4 seems like best choice

Step-by-step explanation:

Other options are physical reactions

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