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3 years ago

Which situation is an indication that a chemical change has occurred?

Chemistry

2 answers:

andreev551 [17]3 years ago

4 0

Heat is released.

When a chemical change occurs, energy comes out of the atoms which causes heat.

coldgirl [10]3 years ago

3 0

Answer: Option (A) is the correct answer.

Explanation:

Chemical changes are defined as the change which tend to show difference in chemical composition of a substance.

For example, toxicity, reactivity, combustion etc are all chemical properties.

So, in the given situation formation of bubbles shows that a gas has been formed which is a chemical change.

A chemical change will always lead to the formation of a new compound and this change is irreversible in nature by any physical means.

On the other hand, a change which is unable to bring any difference in chemical composition of a substance is known as a physical change.

For example, change in shape, size, mass, volume etc are all physical properties.

Thus, we can conclude that a gas is formed is an indication that a chemical change has occurred.

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