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प्रश्न
Select the chemical changes from the following list of changes
Change of seasons
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उत्तर
Change of season is a PHYSICAL change, only change in temperature is seen and is a reversible change.
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संबंधित प्रश्न
Classify the following as physical or chemical change :
Formation of curd from milk
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.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Select the chemical changes from the following list of changes
Rotting of eggs.
Select the chemical changes from the following list of changes
Butter turning rancid
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Natural changes which take place in nature on their own, are beyond the control of human being.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
Keeping a stone in sunlight for few hours is ______.
