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प्रश्न
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
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उत्तर
Sublimation involves a physical change.
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संबंधित प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
Fill in the blank.
A new substance is formed in a ............... change.
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Classify the following as a physical or a chemical change.
Burning of coal
Select the chemical changes from the following list of changes
The carbon cycle.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
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 |
When solute is dissolved in a solvent it forms a solution.
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a –
