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प्रश्न
Classify the following as chemical or physical change:
Rusting of almirah
पर्याय
Chemical change
Physical change
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उत्तर
Chemical change
Explanation:
Rusting of an almirah is a chemical alteration because it produces a new chemical molecule known as hydrated iron oxide (rust).
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संबंधित प्रश्न
Write short answer.
Give an example of desirable change which can also be undesirable
State the differences between a physical change and a chemical change.
State four differences between physical and chemical changes.
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
Tick (√) the correct alternative from the choice given for the following statement.
The compound rust is a hydrated oxide of
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 with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
Select the chemical changes from the following list of changes
Boiling of milk.
Adding sugar to milk is a physical change.
Mention a few physical properties of a substance.
