SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Chemical reactions involve changes in properties and changes in ____ that you can often observe.
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catalyst
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energy
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activation energy
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decomposition
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chemical changes
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Explanation:
Detailed explanation-1: -Answer: Solution: In physical changes, energy is used to change the state of matter. In chemical changes, energy is released when there is decomposition of a substance and absorbed while forming a new substance.
Detailed explanation-2: -The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
There is 1 question to complete.