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प्रश्न
Tick the most appropriate answer.
Photosynthesis requires
पर्याय
heat energy
wind energy
sunlight
sound energy
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उत्तर
sunlight.
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संबंधित प्रश्न
Try segregating the things around you as pure substances or mixtures.
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
State whether the following is physical or chemical changes.
cutting wood into small pieces —
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Classify the following as a physical or a chemical change.
Butter getting rancid
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ change.
Select the correct answer from the choice given below to complete the sentence
The dissolution of lead nitrate in water is deemed as a _________ change.
Distinguish physical and chemical changes.
Adding sugar to milk is a physical change.
