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प्रश्न
Classify the following as a physical or a chemical change.
Boiling of water
उत्तर
Physical change
APPEARS IN
संबंधित प्रश्न
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 four differences between physical and chemical changes.
Fill in the blank.
Growing of a seedling into a plant is _______ change.
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
Write true or false
A natural change can also be a desirable change.
Define a chemical change. Give two examples of the above changes.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Name the following.
A form of energy required for a chemical change.
Natural changes which take place in nature on their own, are beyond the control of human being.
