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प्रश्न
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
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उत्तर
Heating a piece of iron is considered a physical change while heating a piece of coal [carbon] is considered a chemical change.
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Write true or false for the statement
A natural change can also be a desirable change
Write true or false
Decomposition of leaves is a fast change.
Photosynthesis cannot take place at night.
State the Differences Between a Physical Change and a Chemical Change.
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
______ is the substance that is dissolved in a solvent.
Mention some of the different conditions needed for chemical changes to occur.
