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प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
विकल्प
Chemical change
Physical change
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उत्तर
Physical change
Explanation:
Cutting down trees changes their physical shape and size, but does not change their chemical composition or nature. Hence it is classified as a physical change.
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
State the Differences Between a Physical Change and a Chemical Change.
Classify the following as a physical or a chemical change.
Drying of wet clothes
Classify the following as a physical or a chemical change.
Butter getting rancid
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
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.
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
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:
Match the items of Column I with the items of Column II.
| Column I | Column II | ||
| (a) | Large crystals | (i) | Turns lime water into milky |
| (b) | Depositing a layer of zinc on iron | (ii) | Physical change |
| (c) | Souring of milk | (iii) | Rust |
| (d) | Carbon dioxide | (iv) | Sugar candy (Mishri) |
| (e) | Iron oxide | (v) | Chemical change |
| (f) | Dissolving common salt in water | (vi) | Galvanisation |
Iron pipes coated with zinc do not get rusted easily.
