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प्रश्न
Write true or false
Deforestation is a man-made change.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
State the differences between a physical change and a chemical change.
Fill in the blank.
Growing of a seedling into a plant is _______ change.
Tick the most appropriate answer.
Photosynthesis requires
Change is the law of nature and occurs in our everyday life, at all times and in all places. Differentiate between the following change with a suitable example.
Desirable and undesirable change.
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
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.
Water is known as a universal solvent. Why?
Give two examples for the following case:
Physical changes which are reversible
