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प्रश्न
Give two examples for the following case:
Physical changes which are reversible
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उत्तर
- Folding of paper
- Melting of ice
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संबंधित प्रश्न
Classify the following changes as physical or chemical:-boiling
A burning candle shows both physical and chemical changes. Explain ?
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Write true or false
Deforestation is a man-made change.
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Change is the law of nature and occurs in our everyday life, at all times and in all places. Differentiate between the following change with a suitable example.
Desirable and undesirable change.
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Slow and fast change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
______ is the Universal Solvent.
