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प्रश्न
Classify the following as a physical or a chemical change.
Boiling of water
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उत्तर
Physical change
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
State whether the following is physical or chemical changes.
mixing oil with water —
State whether the following is physical or chemical changes.
cutting wood into small pieces —
What is a physical change ? Give two examples of physical changes.
What will you take into account while identifying the following?
A physical change in a substance.
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Ice kept in a beaker, slowly melts and turns into water. The water in the beaker on solidification is freezing turns back to ice. Give four reasons why the change from ice to water and water back to ice is considered a physical change.
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State the conclusions which can be drawn, to represent photosynthesis as a physical or a chemical change.
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 |
The change of state of a substance from solid to liquid and liquid to gas is ______.
