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प्रश्न
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
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उत्तर
Physical change: Sublimation of a solid, making a fruit salad from raw fruits, formation of clouds, and dissolution of carbon dioxide in water Chemical change: Decomposition of water into hydrogen and oxygen by passing electric current (electrolysis)
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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.
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
What role does energy play in initiating a chemical change ?
Name two reversible changes.
Classify the following as physical or chemical change :
Formation of curd from milk
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
When ice melts to form water, change occurs in its
Gas exists in three states as solid, liquid, and gas.
