Advertisements
Advertisements
प्रश्न
Distinguish between the following.
Physical change and chemical change
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
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
Melting of solid (wax) is a physical change.
Give two examples of periodic changes.
Sublimation is classified as a physical change. Why ?
State the various conditions that favour the process of evaporation.
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Give the reason why the following is considered as chemical changes.
A bright light is seen evolved when a strip of magnesium is heated.
Name the following.
A form of energy required for a chemical change.
Explain the characteristics of physical change with examples.
