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प्रश्न
State whether the following is physical or chemical changes.
lightning —
उत्तर
chemical change,
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
Make a list of different types of changes with example.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible 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 |
The change of state of a substance from solid to liquid and liquid to gas is ______.
Cutting a log of wood into pieces is a chemical change.
