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प्रश्न
Give two examples for the following case:
Physical changes which are not reversible
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उत्तर
- Cutting of paper
- Breaking of glass
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संबंधित प्रश्न
Explain the following giving an example.
Pure substance
True or false
Is melting of ice a reversible change?
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
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.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
Is a change of state of matter – a physical or a chemical change. Give reasons.
Which of the following is a physical change?
Which of the following is not a physical change?
