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प्रश्न
Fill in the blanks with the appropriate words of the statement given below:
Chemical changes may involve exchange of energy in the form of __________ and _________.
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उत्तर
Chemical changes may involve exchange of energy in the form of light and heat.
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
Boiling of an egg —
Tick (√) the correct alternative from the choice given for the following statement
Burning is a
Fill in the blank
An earthquake is a _______ change.
Under which different types can the following changes be classified?
Stretching of a spring.
How can a change occur in a substance?
Observe the picture containing a kettle and note that it has salt water in it and answer the following questions:
- What is name of the process that is done to the kettle?
- What will happen to the content of the kettle?
- What kind of change is occurring on the cold surface of the metal plate?
- What can you say about the quality of water that is obtained in the beaker?
Paper, LPG, CNG petrol, etc, are ______ substances.
The difference between initial state and the final state is called change.
What is the change?
Cut vegetables turn brown when exposed to air, this is due to ______.
