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प्रश्न
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
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उत्तर
| Physical change | Chemical change |
| Changes are temporary and reversible. | Change is permanent and irreversible |
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संबंधित प्रश्न
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Define physical change. Give two examples for the above changes.
Solve this crossword by using the clues that follow-
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1 . It is the change that takes place in case of swinging pendulum of a clock. –
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change.
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
Select the chemical changes from the following list of changes
Rotting of eggs.
Select the chemical changes from the following list of changes
Breaking of glass
Stretching gold coin into a ring is a ______ change.
What type of change is colouring of a paper?
