Subject :NSO Class : Class 7
Study the given Venn diagram carefully.
Identify 1, 2 and 3.
| 1 | 2 | 3 | |
| A | Melting of ice | Rusting of iron | Cutting a log of wood |
| B | Glowing of bulb | Bursting a tyre | Crystallisation |
| C | Stitching of garments | Burning a matchstick | Burning of a candle |
D |
Melting of ice | Decomposition of sugar | Sublimation |
Answer please
Ans 1:
Class : Class 5
Ans 2:
Class : Class 5
why isn't the answer a that cutting wood can be a physical change (dead tree) and a chemical change ( all chemical reactions have stopped )
Ans 3:
Class : Class 8
The answer is Option C..
Because burning of candle is both physical and chemical change(melting of wax could be assumed as physical change and the burning of the thread can be assumed as chemical change.. Also, sublimation of wax also takes place and can be classified as physical change.)
Ans 4:
Class : Class 8