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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
Classify the following as chemical or physical change:
Melting of butter in a pan
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Classify the following changes as physical or chemical: curdling of milk
State the various conditions that favour the process of evaporation.
Which of the following are physical changes and which are chemical changes ?
Freezing of water
What will you take into account while identifying the following?
A chemical change in a substance.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Explain the term – ‘sublimation’. Is sublimation of naphthalene – a physical or a chemical change. Give reasons.
Give the reason why the following is considered as chemical changes.
A bright light is seen evolved when a strip of magnesium is heated.
Physical Change: Boiling::Chemical Change: ______.
