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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
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
Write true or false
Melting of ice is a physical change.
Give two examples of periodic changes.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
Iron pipes coated with zinc do not get rusted easily.
