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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.
उत्तर
| Physical change | Chemical change |
| Changes are temporary and reversible. | Change is permanent and irreversible |
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Write true or false for the statement
A natural change can also be a desirable change
Write short answer.
What are man-made 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
A burning candle shows both physical and chemical changes. Explain ?
State whether the following is physical or chemical changes.
water cycle in nature —
Tick the most appropriate answer.
Photosynthesis requires
What are man-made changes ?
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
