Chemistry
Grade-10
Easy
Question
Which of these examples is a physical change?
Hint:
A physical change is a type of change where the physical properties of matter undergo change.
The correct answer is:
A broken pencil is an example of physical change.
- The burning of coal is not a physical change, when coal is burnt, the carbon is changed to carbon dioxide which is the formation of new products. Also, this process is irreversible.
- Adding baking soda to water causes change to the water, it is a chemical change, aside from the slight and fast-acting dizziness, the physical composition of the after is not altered. Hence it is not a physical change.
- In the ripening of bananas, the chemical composition of the banana changes, and it is irreversible.
- Since the size of a pencil reduces once broken, it can be said as an example of physical change.
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