Advertisements
Advertisements
Question
State whether the following is physical or chemical changes.
Melting of wax —
Solution
physical change.
APPEARS IN
RELATED QUESTIONS
What do you observe when :
a piece of paper is burnt
Tick (√) the correct alternative from the choice given for the following statement
When sugar is heated, its colour changes into
True or false?
During a physical change energy is either given out or absorbed by the system.
Melting of solid (wax) is a physical change.
Distinguish between the following.
Periodic change and non-periodic change
Under which different types can the following changes be classified?
Bursting of a cracker.
Under which different types can the following changes be classified?
Occurrence of an earthquake.
Fill in the blank with the correct word of the statement given below:
Ammonium chloride, a sublimable solid undergoes _________ on heating.
Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not.
S. No. | Change | Can be reversed (Yes/No) |
1. | The sawing of a piece of wood | |
2. | The melting of ice candy | |
3. | Dissolving sugar in water | |
4. | The cooking of food | |
5. | The ripening of a mango | |
6. | Souring of milk |
Cut vegetables turn brown when exposed to air, this is due to ______.