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प्रश्न
Is burning a physical change or a chemical change? Why?
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उत्तर
Burning is a chemical change as new substance is formed with new properties and it cannot be reversed.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
Give four difference between physical and chemical changes.
What will you take into account while identifying the following?
A physical change in a substance.
What will you take into account while identifying the following?
A chemical change in a substance.
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Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
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:
Mention a few physical properties of a substance.
