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Which of the following occurrence indicates that a chemical reaction has taken place?

a. An odor is produced by burning a sugar cube.
b. A puddle is produced by melting an ice cube.
C. A loud noise is produced by crushing a can.
d. A shard of glass is produced by breaking a bottle.

1 Answer

13 votes
A. an odor is produced by burning a sugar cube

The rest are mainly just physical changes
User Darkace
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