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प्रश्न
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
पर्याय
released
absorbed
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उत्तर
The energy required for completion of a physical change is released when the change is reversed.
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
Write true or false
Burning of paper and formation of curd are reversible changes.
Write true or false
Deforestation is a man-made change.
Classify the following as a physical or a chemical change.
Burning of paper
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
What is the difference between dissolution of sugar and burning of sugar ?
Water is the universal solvent. Why?
Cutting a log of wood into pieces is a chemical change.
