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प्रश्न
Classify the following as a physical or a chemical change.
Melting of wax
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उत्तर
Physical change
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Write true or false
Cutting of paper into pieces is a chemical change.
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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.
Drying of wet clothes
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
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The dissolution of lead nitrate in water is deemed as a _________ change.
Distinguish physical and chemical changes.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
