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प्रश्न
Select the chemical changes from the following list of changes
The occurrence of lightning.
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उत्तर
Occurance of lightening is a CHEMICAL change, energy is produced, a new substance with new properties is produced.
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संबंधित प्रश्न
When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.
Fill in the blank.
An earthquake is a .................. change.
Photosynthesis cannot take place at night.
Define physical change. Give two examples for the above changes.
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
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.
Select the chemical changes from the following list of changes
Respiration in mammals.
What type of change is colouring of a paper?
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
