Advertisements
Advertisements
प्रश्न
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
उत्तर
- Boiling of water is a physical change:
On boiling, water is converted into steam. If we cover the beaker with a lid, steam condenses back to water. So, boiling, of water is a physical change since only the physical state of water changes.
- Boiling of egg is chemical change:
When egg is boiled, chemical nature of the egg changes. The properties of a boiled egg are totally different from the raw egg. Hence, boiling of an egg is a chemical change.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Classify the following changes as physical or chemical:- photosynthesis in plants
Define physical change. Give two examples for the above changes.
A burning candle shows both physical and chemical changes. Explain ?
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Classify the following as a physical or a chemical change.
Melting of wax
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
State whether the following statement is true or false. If false write the correct statement.
Melting of butter and wax are examples of chemical changes.
Select the chemical changes from the following list of changes
The occurrence of lightning.
Explain the characteristics of physical change with examples.
