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प्रश्न
Melting of solid (wax) is a physical change.
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उत्तर
Melting of solid wax is a physical change because no new substance is formed during this change.
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संबंधित प्रश्न
What do you observe when :
a spoon of sugar is heated in a pan
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
Fill in the blank
An earthquake is a _______ 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?
Stretching of a spring.
Explain in brief the involvement of energy in physical and chemical changes.
Fill in the blank with the correct word of the statement given below:
Ammonium chloride, a sublimable solid undergoes _________ on heating.
How can a change occur in a substance?
Picture based question
Observe the picture and list down the changes that are accompanied in the picture.
- ______.
- ______.
- ______.
______ is the process in which something becomes different from what it was earlier.
