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

A) formation of a gas
B) boiling of a substance
C) melting of a substance
D) freezing of a substance

User Makambi
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2 Answers

6 votes
Hi! The answer to this question would be B. The boiling of a substance. xx
User Liviu
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2 votes
" formation of a gas" Is the answer you are looking for this is because the chemical change can happen without freezing melting or boiling a substance

User Ghostatron
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