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प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
विकल्प
Chemical change
Physical change
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उत्तर
Chemical change
Explanation:
Burning paper is a chemical change since the combustion products, carbon dioxide, water vapours, smoke, and ash, cannot be turned back into paper or wood using any physical means.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Melting of butter in a pan
Classify the following as chemical or physical change:
Rusting of almirah
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Classify the following changes as physical or chemical:-boiling
Photosynthesis cannot take place at night.
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
Select the chemical changes from the following list of changes
Breaking of glass
Grinding of wheat grain changes its size. It is a ____________ change.
Cutting a log of wood into pieces is a chemical change.
