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प्रश्न
State whether the following is physical or chemical changes.
Slaking of lime —
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उत्तर
chemical change.
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संबंधित प्रश्न
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Dissolving salt in water is a reversible change.
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Explain the term – ‘sublimation’. Is sublimation of naphthalene – a physical or a chemical change. Give reasons.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Compare the energy changes involved during a physical and a chemical change.
Select the chemical changes from the following list of changes
Breaking of glass
Select the chemical changes from the following list of changes
Butter turning rancid
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
