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प्रश्न
State whether the following is physical or chemical change.
Digestion of food —
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उत्तर
chemical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Photosynthesis cannot take place at night.
Solve this crossword by using the clues that follow.
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1. It is the change that takes place in case of swinging pendulum of a clock.
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change
State whether the following is physical or chemical changes.
shaping a piece of glass —
Write true or false
Rusting of iron is a chemical change.
Name two reversible changes.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
