Question
Explain the physical and chemical processes along with examples.
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Answer
A change in which a substance undergoes a change in its physical properties is called physical change, physical properties involves shape, size, colour and state of a substance. It is generally reversible; in physical change no new substance is formed. For example: evaporation, condensation etc. A change in which one or more new substances are formed is called chemical change. Chemical change is irreversible. It is also called chemical reaction; in this type of change a new substance is formed. Example- Burning of coal, photosynthesis. The difference between physical change and chemical change is as follows- Physical change.
- No new substance is formed. A substance undergoes a change in its physical properties.
- Physical change is generally reversible.
- One or more new substances are formed by chemical reaction.
- Chemical change is irreversible.
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