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Question
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Options
physical
chemical
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Solution
A change in which matter undergoes a change but the total mass of the substance is unaltered is a physical change.
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RELATED QUESTIONS
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
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Make a list of different types of changes with example.
Fill in the blank with the appropriate word of the statement given below:
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- 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.
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Vaporisation of water into water vapour.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
In a solution of salt in water, water is the solute
Natural changes which take place in nature on their own, are beyond the control of human being.
Keeping a stone in sunlight for few hours is ______.
