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प्रश्न
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
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उत्तर
chemical change,
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संबंधित प्रश्न
Explain the following giving an example.
Pure substance
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State three differences between evaporation and boiling
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Fill in the blank
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Potassium chloride is added to water and stirred. A salt solution is obtained, which is then boiled, leaving behind a residue.
- Is the above change physical or chemical?
- Name the residue which remains behind after the salt solution is boiled.
- Is the change reversible or not reversible?
- Are the composition and properties of the original substance altered?
- Give a reason why the above experimentation would not be possible if calcium carbonate was taken in place of potassium chloride.
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Wood to sawdust:______:: Wood to Ash: Chemical change
