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Question
Classify the following as a physical or a chemical change.
Butter getting rancid
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Solution
Chemical change
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RELATED QUESTIONS
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Match the columns.
| Column A | Column B |
| 1. a change which cannot be easily reversed | a. man-made change |
| 2 a change that repeats itself at regular intervals | b. chemical chang |
| 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 formed | e. irreversible change |
| f . slow change |
Give two examples of periodic changes.
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Select the chemical changes from the following list of changes
Boiling of milk.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
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- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
Analogy:
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Popping of popcorn: ______.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
