Advertisements
Advertisements
Question
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Solution
| Physical change | Chemical change |
| Generally, energy is neither absorbed nor released during the change. | Generally, energy is either absorbed or evolved during change. |
| Example: Melting of ice, melting of the wax. | Example: Change of milk into curd and burning of a candle. |
APPEARS IN
RELATED QUESTIONS
Photosynthesis cannot take place at night.
State whether the following is physical or chemical changes.
burning of sugar —
True or false
Is the process of digestion a physical change?
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
Differentiate between a physical change and a chemical change with reference to – Formation of products.
State the observations seen, when milk in a dish is kept aside for a few hours or more. Is the change which occurs – a physical change or a chemical change. Give reasons.
Select the chemical changes from the following list of changes
Breaking of glass
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
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 |
Explain the characteristics of physical change with examples.
