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प्रश्न
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
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उत्तर
Physical change
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संबंधित प्रश्न
Melting of solid (wax) is a physical change.
State whether the following is physical or chemical changes.
respiration in living beings —
Write true or false
Burning of sugar is a temporary change.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
What type of energy changes is associated when ice melts?
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
Adding sugar to milk is a physical change.
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
