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प्रश्न
State four differences between physical and chemical changes.
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उत्तर
| Physical change | Chemical 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.
Write short answer.
What are man-made changes ?
Make a list of different types of changes with example.
Classify the following changes as physical or chemical:- photosynthesis in plants
Name a chemical change which takes place in presence of:
Write true or false
A natural change can also be a desirable change.
The rusting of an iron object is called :
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
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 |
