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प्रश्न
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. |
उत्तर
| 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 | B: Chemical change |
| 4. Tarnishing of copper | B: Chemical change |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. | A: Physical change |
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Write true or false
Melting of ice is a physical change.
Classify the following as physical or chemical change :
Growth of a plant
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Classify the following as a physical or a chemical change.
Burning of paper
Select the chemical changes from the following list of changes
Breaking of glass
Select the chemical changes from the following list of changes
Butter turning rancid
Name the following.
A form of energy required for a chemical change.
Classify the following as physical or chemical properties
The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.
