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प्रश्न
Differentiate between a physical change and a chemical change with reference to – Formation of products.
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उत्तर
| Physical change | Chemical change |
| No new products are formed. | New products are formed. |
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
State whether the following is physical or chemical changes.
respiration in living beings —
Classify the following changes as physical or chemical.
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Is a change of state of matter – a physical or a chemical change. Give reasons.
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Give two examples for the following case:
Physical changes which are not reversible
