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प्रश्न
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
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उत्तर
Physical property
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संबंधित प्रश्न
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
Photosynthesis cannot take place at night.
Classify the following changes as physical or chemical.
State the Differences Between a Physical Change and a Chemical Change.
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
State the conclusions which can be drawn, to represent photosynthesis as a physical or a chemical change.
Give reasons why – separation of mixtures e.g. iron from a mixture of iron and sulphur is a physical change, but heating a mixture of iron and sulphur is considered a chemical change.
Select the chemical changes from the following list of changes
The carbon cycle.
