GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Breaking a pencil in half is an example of a ____ change.
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Chemical
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Physical
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Breaking of pencil is a physical change.
Detailed explanation-2: -A physical change is any change in a substance’s form that does not change its chemical makeup. Examples of physical changes are breaking a stick or melting ice. A chemical change, or chemical reaction, occurs when atoms of a substance are rearranged, and the bonds between the atoms are broken or formed.
Detailed explanation-3: -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.
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