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प्रश्न
Which of the following are physical changes and which are chemical changes ?
Freezing of water
विकल्प
Physical change
Chemical change
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उत्तर
Freezing of water – Physical change
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संबंधित प्रश्न
Classify the following changes as physical or chemical:- melting of a solid (wax)
True or false
In a physical change no net energy change is involved.
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 |
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Which of the following are physical changes and which are chemical changes ?
The rusting of an iron object is called :
Classify the following as a physical or a chemical change.
Burning of coal
Define a chemical change. Give two examples of the above changes.
Fill in the blank.
The reaction in which energy is evolved is called
Is a change of state of matter – a physical or a chemical change. Give reasons.
