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प्रश्न
Give two examples for the following case:
Physical changes which are not reversible
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उत्तर
- Cutting of paper
- Breaking of glass
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संबंधित प्रश्न
Write true or false for the statement
Decomposition of leaves is a fast change.
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
Write true or false
Decomposition of leaves is a fast change.
Sublimation is classified as a physical change. Why ?
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
What will you take into account while identifying the following?
A physical change in a substance.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
