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प्रश्न
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
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उत्तर
Physical property
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Rusting of almirah
Changes in which only ______ properties of a substance change are called physical changes.
State whether the following is physical or chemical changes.
lightning —
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
Classify the following as physical or chemical change :
Condensation of steam
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
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. |
Select the chemical changes from the following list of changes
Respiration in mammals.
Fill in the blanks in the following statements using the words given in the box.
| rusted, colourful, substance, chemical, physical, reversible, iron oxide, object |
- Making sugar solution is a ______ change.
- A physical change is generally ______.
- Grinding of wheat grain changes its size. It is a ______ change.
- Iron benches kept in lawns and gardens get ______. It is a ______ change because a new ______ is formed.
Mention a few physical properties of a substance.
