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प्रश्न
Write true or false
Rusting of iron is a chemical change.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Classify the following changes as physical or chemical:-boiling
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Define a chemical change. Give two examples of the above changes.
Given reason:
Burning of paper is a chemical change.
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a –
Adding sugar to milk is a physical change.
Mention some of the different conditions needed for chemical changes to occur.
Give an example of a physical change in which the color of the substance changes.
