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प्रश्न
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
पर्याय
periodic change
undesirable change
physical change
reversible change
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उत्तर
periodic change.
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संबंधित प्रश्न
State three differences between evaporation and boiling
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
State whether the following is physical or chemical change.
Digestion of food —
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
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.
What is a physical change ? Give two examples of physical changes.
Fill in the blank.
The process of a liquid changing into a solid is called ________
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
In a solution of salt in water, water is the solute
Physical Change: Boiling::Chemical Change: ______.
