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प्रश्न
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
विकल्प
True
False
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उत्तर
This statement is False.
Explanation:
Stretching of rubber bands is a physical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
Melting of solid (wax) is a physical change.
Is burning a physical change or a chemical change? Why?
State three differences between evaporation and boiling
Solve this crossword by using the clues that follow-
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1 . It is the change that takes place in case of swinging pendulum of a clock. –
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change.
Make a list of different types of changes with example.
Classify the following as a physical or a chemical change.
Burning of coal
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Potassium chloride is added to water and stirred. A salt solution is obtained, which is then boiled, leaving behind a residue.
- Is the above change physical or chemical?
- Name the residue which remains behind after the salt solution is boiled.
- Is the change reversible or not reversible?
- Are the composition and properties of the original substance altered?
- Give a reason why the above experimentation would not be possible if calcium carbonate was taken in place of potassium chloride.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
