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प्रश्न
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
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उत्तर
chemical change.
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.
Write true or false for the statement
Decomposition of leaves is a fast change.
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.
Classify the following as a physical or a chemical change.
Drying of wet clothes
What will you take into account while identifying the following?
A chemical change in a substance.
Select the chemical changes from the following list of changes
Breaking of glass
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
Which of the following is a physical change?
