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प्रश्न
Write true or false
Decomposition of leaves is a fast change.
विकल्प
True
False
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उत्तर
False.
Decomposition of leaves is a slow change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
Name a chemical change which takes place in presence of:
Classify the following as a physical or a chemical change.
Butter getting rancid
Classify the following as a physical or a chemical change.
Burning of paper
Given reason:
Burning of paper is a chemical change.
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.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
Cutting a log of wood into pieces is a chemical change.
