BIOLOGY
ENZYMES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is NOT an example of chemical change?
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sour milk
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burning wood
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breaking a pencil
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rust
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Explanation:
Detailed explanation-1: -Since the size of a pencil reduces once broken, it can be said as an example of physical change.
Detailed explanation-2: -Breaking of pencil is a physical change.
Detailed explanation-3: -Melting of ice is not an example of chemical change as the chemical composition of water remains the same even after melting.
Detailed explanation-4: -Breaking is a physical change because the shards are still glass, but it can’t be easily made whole again.
Detailed explanation-5: -Note: Breaking a brick, evaporation of liquid, and moving a wheel, are examples of physical changes as no change is observed in the chemical composition in carrying out these processes.
There is 1 question to complete.