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Chemistry

Answered

Which evidence is an indication that a chemical reaction has occurred?
A Freezing of a substance
B formation of a gas
C boiling of a substance
D melting of a substance

Answer :

MMENDE1775IN MMENDE1775IN

B

When you have a substance melt freeze or boil it just changes it physical characteristics but when you a substance produces gas you have chemical reactions and molecular changes happening.

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