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प्रश्न
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
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उत्तर
If a change is permanent and irreversible it is considered a chemical change.
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संबंधित प्रश्न
Explain the following giving an example.
Pure substance
Define physical change. Give two examples for the above changes.
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
Fill in the blank
Revolution of the earth around the sun is a ________ change.
State whether the following is physical or chemical changes.
water cycle in nature —
True or false
Change of seasons is a non-periodic change.
Distinguish between the following.
Physical change and chemical change
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Filling up a balloon with hot air is a _______ change.
Wood to sawdust:______:: Wood to Ash: Chemical change
