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Question
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
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Solution
Freezing Point.
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RELATED QUESTIONS
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Changes in which only ______ properties of a substance change are called physical changes.
Melting of solid (wax) is a physical change.
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
True or false
Dissolving of a solid in liquid is a physical change.
Fill in the blank
Changes that occur in nature are called ______
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
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.
Match the following
| Sr. No. | A | B | C |
| 1. | Melting | Change of state from liquid to solid | Ticking of clock |
| 2. | Condensation | Change of state from liquid to gas | Formation of ice cube |
| 3. | Evaporation | Change of state from solid to liquid | Collecting flowers |
| 4. | Freezing | Change of state from gas to liquid | Ice cube to water |
| 5. | Periodic change | Occurs at irregular time intervals | Water to steam |
| 6. | Non-periodic change | Occurs at regular time intervals | Steam to water drops |
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.
