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प्रश्न
State whether the following is physical or chemical changes.
glowing of a bulb -
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उत्तर
physical change,
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संबंधित प्रश्न
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
Fill in the blank.
An earthquake is a .................. change.
Write true or false
Cutting of paper into pieces is a chemical change.
Give two examples of periodic changes.
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Distinguish between the following.
Physical change and chemical change
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
Iron pipes coated with zinc do not get rusted easily.
Give an example of a physical change in which the color of the substance changes.
