Advertisements
Advertisements
प्रश्न
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Advertisements
उत्तर
Is a chemical change as sulphur (yellowish-green) on burning produces SO2 gas which is acidic in nature and a new substance with new properties is formed
APPEARS IN
संबंधित प्रश्न
Ripening of fruits is a desirable change.
Melting of solid (wax) is a physical change.
What are reversible and irreversible changes ? Give one example for each.
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
Classify the following as a physical or a chemical change.
Burning of paper
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Distinguish between the following.
Physical change and chemical change
Is a change of state of matter – a physical or a chemical change. Give reasons.
Match the examples of changes in List I with the correct type of change in List II.
| List I | List II |
| 1. Burning of paper | A: Physical change |
| 2. The ringing of an electric bell | B: Chemical change |
| 3. Curdling of milk | |
| 4. Electric light is switched on | |
| 5. Melting of butter |
