Advertisements
Advertisements
प्रश्न
Distinguish between the following.
Physical change and chemical change
Advertisements
उत्तर
| Physical Change | Chemical Change | |
| 1. | The chemical composition of a substance does not change. | The chemical composition of a substance does not remain the same. |
| 2. | Easily reversible | Not easily reversible |
| 3. | No new substance is formed | New substances are always formed |
| 4. | Melting of ice is an example of physical change. | The burning of paper is an example of chemical change. |
संबंधित प्रश्न
When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.
How do you say that the process of digestion is a chemical change ?
True or false
Is melting of ice a reversible change?
A physical change is temporary. Explain.
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
The change of state of a substance from solid to liquid and liquid to gas is ______.
Adding sugar to milk is a physical change.
Explain the characteristics of physical change with examples.
