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प्रश्न
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.
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उत्तर
Carbon dioxide and water cannot be obtained back from glucose and oxygen hence it is a chemical change.
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संबंधित प्रश्न
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Chemical changes are accompanied by changes in energy.
Is burning a physical change or a chemical change? Why?
State whether the following is physical or chemical changes.
burning of sugar —
State whether the following is physical or chemical change.
Digestion of food —
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
When ice melts to form water, change occurs in its
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
