Advertisements
Advertisements
प्रश्न
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Advertisements
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
State whether the following is physical or chemical changes.
glowing of a bulb -
What is a chemical change ? Give two examples of chemical changes.
Define a chemical change. Give two examples of the above changes.
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.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
Keeping a stone in sunlight for few hours is ______.
Mention a few physical properties of a substance.
Give an example of a physical change in which the color of the substance changes.
