Advertisements
Advertisements
Question
Select the chemical changes from the following list of changes
Change of seasons
Advertisements
Solution
Change of season is a PHYSICAL change, only change in temperature is seen and is a reversible change.
APPEARS IN
RELATED QUESTIONS
Classify the following as chemical or physical change:
Burning of paper and wood
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Chemical changes are accompanied by changes in energy.
Fill in the blank
Changes that occur in nature are called ______
Classify the following as a physical or a chemical change.
Burning of paper
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 rusting of iron is a chemical change but, the magnetization of iron is a physical change.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
Give the reason why the following is considered as chemical changes.
A bright light is seen evolved when a strip of magnesium is heated.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
