Advertisements
Advertisements
प्रश्न
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
विकल्प
physical
chemical
Advertisements
उत्तर
A change in which matter undergoes a change but the total mass of the substance is unaltered is a physical change.
APPEARS IN
संबंधित प्रश्न
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Fill in the blank.
Changes that occur in nature are called ........................
True or false
Is melting of ice a reversible change?
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Periodic and non-periodic change
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
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 |
