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प्रश्न
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
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उत्तर
The crystallisation of salt from its solution is a PHYSICAL change as only state changes (crystals are formed), the composition does not change, is reversible, no change in mass takes place.
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संबंधित प्रश्न
Explain the following giving an example.
Pure substance
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Dissolving salt in water is a reversible change.
State whether the following is physical or chemical changes.
water cycle in nature —
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Fill in the blank
Changes that occur in nature are called ______
Classify the following as physical or chemical change :
Formation of curd from milk
Select the chemical changes from the following list of changes
Rotting of eggs.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
