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प्रश्न
Give four difference between physical and chemical changes.
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उत्तर
The differences are Physical and Chemical Changes:
Physical change
- In a physical change no new substance is formed and the chemical composition of substance remains same. There are changes only in physical properties and state.
- Temporaiy change which can be reversed by simple physical methods.
- Weight of original substance doesn’t change
- Energy like heat, light etc. may or may not be absorbed or released
Chemical change
- In a chemical change new substance with entirely different chemical composition and properties is formed.
- Permanent change and irreversible
- Weight of original substances may increase or decrease
- Energy like heat, light etc. are given out or absorbed.
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Chemical changes are accompanied by changes in energy.
Write short answer.
Give two examples of periodic changes
State the Differences Between a Physical Change and a Chemical Change.
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
When ice melts to form water, change occurs in its
What is the difference between dissolution of sugar and burning of sugar ?
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
