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प्रश्न
Give two examples of periodic changes.
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उत्तर
Swinging of a pendulum
Rising and setting of the sun.
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
glowing of a bulb -
State whether the following is physical or chemical changes.
Slaking of lime —
Write true or false
A natural change can also be a desirable change.
Classify the following as a physical or a chemical change.
Burning of paper
Distinguish between the following.
Physical change and chemical change
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
Sublimation of Iodine is a ______.
Give two examples for the following case:
Physical changes which are not reversible
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
