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Question
Write true or false
Rusting of iron is a chemical change.
Options
True
False
Solution
True
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RELATED QUESTIONS
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
State the various conditions that favour the process of evaporation.
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
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Fill in the blank.
The reaction in which energy is evolved is called
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. |
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Name the following.
A form of energy required for a chemical change.
Iron pipes coated with zinc do not get rusted easily.
