SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Changes of state are different to chemical changes because ____
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____ changes of state can be reversed to recover the original properties of the material.
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____ changes of state result in the creation of new substances.
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____ changes of state cannot happen to gases.
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None of the above
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Explanation:
Detailed explanation-1: -In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.
Detailed explanation-2: -The change of state of a substance does not involve the formation of new molecules. A change in temperature or pressure can reverse the change in state. Therefore, a change in state is a physical change.
Detailed explanation-3: -Physical changes do not produce a new substance. Chemical changes result in the production of a new substance and cannot be reversed.
There is 1 question to complete.