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प्रश्न
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
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उत्तर
Preparation of carbon dioxide from calcium carbonate and dilute hydrochloric acid is a CHEMICAL change as new K substance with new properties is formed, the change is permanent and irreversible.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
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respiration in living beings —
Tick (√) the correct alternative from the choice given for the following statement
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| 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 |
The change of state of a substance from solid to liquid and liquid to gas is ______.
