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Which is not proof that a chemical change has occurred?

a. the color changes
B. a precipitate forms
C. the substance melts
D. bubbles are produced

2 Answers

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Answer:

C

Step-by-step explanation:

When a substance undergoes a chemical change, the chemical properties of the substance changes, and it usually combines with another substance or forms products that form a precipitate.

When a substance melts, there is not any actual chemical change to the substance. Yes, there is a physical change that alters the physical properties of the substance, but no chemical change happens.

A colour change can occur because of two substances interacting, and in this interaction, the substances chemically alter each other.

A precipitate being formed and bubbles being produces is a result of chemical changes that result in the chemicals producing products in a different state than what they originally came in.

User Alok Kumar Singh
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7 votes

Answer:

the substance melts

Choice C

Step-by-step explanation:

A chemical change refers a process by which one substance changes into a new substance with different properties with the formation of one or more new substances.

Color change, formation of a precipitate and production of bubbles all indicate the occurrence of a chemical change. On the other hand, melting is purely a physical change since no new substance is formed and the process can easily be reversed through freezing.

User Nabin Dhakal
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7.7k points
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