What does colour change during a chemical reaction indicate?
Answer and explanation
Correct answer: An indication of formation of a new substance
A colour change during a chemical reaction often indicates the formation of a new substance, because the product may have properties different from those of the reactants. It does not always mean a physical change, nor does it require the temperature to decrease. Exam tip: Remember colour change as a possible sign of a chemical reaction, along with gas evolution, precipitate formation, and temperature change.
Frequently asked questions
What is the correct answer to this question?
An indication of formation of a new substance
Why is this the correct answer?
A colour change during a chemical reaction often indicates the formation of a new substance, because the product may have properties different from those of the reactants. It does not always mean a physical change, nor does it require the temperature to decrease. Exam tip: Remember colour change as a possible sign of a chemical reaction, along with gas evolution, precipitate formation, and temperature change.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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