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प्रश्न
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
विकल्प
periodic change
undesirable change
physical change
reversible change
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उत्तर
periodic change.
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Select the chemical changes from the following list of changes
The occurrence of lightning.
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
Physical Change: Boiling::Chemical Change: ______.
Natural changes which take place in nature on their own, are beyond the control of human being.
Grinding of wheat grain changes its size. It is a ____________ change.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
