Which of the following would not necessarily indicate a chemical reaction?

change in temperature

chemical precipitation of a solid

production of a gas

change in volume

Question

Answered

Verified Answer :

OlaMacgregor OlaMacgregor · Answer 1 · 2019-10-31T01:30:50-04:00

Answer: Option (d) is the correct answer.

Explanation:

A change that does not cause any difference in chemical composition of a substance are known as physical change.

For example, shape, size, mass, volume, density, etc of a substance are all physical changes.

And, a change that causes changes in chemical composition of a substance is known as chemical change.

For example, precipitation, reactivity, toxicity etc are chemical change.

Therefore, change in temperature, chemical precipitation of a solid
, production of a gas are all indications of a chemical change.

Thus, we can conclude that change in volume would not necessarily indicate a chemical reaction.