Advertisements
Advertisements
प्रश्न
Write true or false
Earthquake is a desirable change.
पर्याय
True
False
Advertisements
उत्तर
False
APPEARS IN
संबंधित प्रश्न
State the differences between a physical change and a chemical change.
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Tick (√) the correct alternative from the choice given for the following statement.
The compound rust is a hydrated oxide of
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
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
Metallic sodium is soft enough to be cut with a knife.
State whether the following statement is true or false:
Anaerobic bacteria digest animal waste and produce biogas.
What kind of change is shown by tearing of paper?
