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Question

Which of the following changes indicate that a chemical change has not been taken place?


A
No new substance is formed
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B
Absorption or release of heat
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C
Change in colour
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D
Evolution of gas
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Solution

The correct option is A No new substance is formed
A chemical change is a permanent change in which new substances are formed that are entirely different from the original substance.
It is usually accompanied by:
change in colour
formation of new substances
evolution of gas
release or absorption of energy in the form of heat or light or sound, etc.

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