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प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
पर्याय
Physical change
Chemical change
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उत्तर
Chemical change
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संबंधित प्रश्न
Write true or false
Burning of paper and formation of curd are reversible changes.
Give two examples of periodic changes.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Give two examples for the following case:
Physical changes which are reversible
Mention some of the different conditions needed for chemical changes to occur.
Explain the characteristics of physical change with examples.
