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प्रश्न
Select the chemical changes from the following list of changes
Change of seasons
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उत्तर
Change of season is a PHYSICAL change, only change in temperature is seen and is a reversible change.
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संबंधित प्रश्न
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Write true or false for the statement
Decomposition of leaves is a fast change.
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
What will you take into account while identifying the following?
A chemical change in a substance.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
In a solution of salt in water, water is the solute
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
When solute is dissolved in a solvent it forms a solution.
