SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Physical Change
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Chemical Change
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Either A or B
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None of the above
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Detailed explanation-1: -During the physical change neither the chemical composition nor chemical nature of the substance changes. For example:Tearing a paper is a physical change because when the paper is torn only the appearance of paper is changed. 2.
Detailed explanation-2: -When we tear a piece of paper, we can see that the chemical content remains the same; only one thing that’s changed is the size of the paper bits that form as we tear the paper further. Its physical state has changed. As a result, tearing a piece of paper is an irreversible physical change.
Detailed explanation-3: -The pieces of paper obtained have the same molecules as the original sheet of paper. Thus, tearing of a paper sheet is a not a chemical change, but it is a physical change.
Detailed explanation-4: -Answer and Explanation: During cutting, the appearance of the material only changes, which is a physical change.
Detailed explanation-5: -Tearing of paper is a physical change that cannot be reversed because there is no alteration in the chemical composition of paper.