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Question
Write true or false
Melting of ice is a physical change.
Options
True
False
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Solution
True
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RELATED QUESTIONS
Classify the following as chemical or physical change:
Rusting of almirah
Match the columns
| column A | coulmn B |
| 1. A change which cannot be easily reversed | a. man-made change |
| 2.A change that repeats itself at regular intervals | b. chemical change |
| 3. A change that is made by humans | c. physical change |
|
4. A change in which the original substance cannot be obtained |
d. periodic change |
| 5. A change where no new substance is formade | e. irreversible change |
| f. slow change |
Write true or false
Rusting of iron is a chemical change.
Write true or false
Earthquake is a desirable change.
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
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.
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.
Filling up a balloon with hot air is a _______ change.
Distinguish physical and chemical changes.
