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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 the differences between a physical change and a chemical change.
State four differences between physical and chemical changes.
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
What are man-made changes ?
Classify the following as a physical or a chemical change.
Butter getting rancid
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Distinguish physical and chemical changes.
Water is known as a universal solvent. Why?
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
