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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
What do you observe when :
a spoon of sugar is heated in a pan
Fill in the blank
Burning of fuel is a _______ change.
State whether the following is physical or chemical changes.
passing electric current through a heater rod —
State whether the following is physical or chemical changes.
Melting of wax —
Fill in the blank
An earthquake is a _______ change.
Chemical changes are accompanied by changes in energy.
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.
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?
The difference between initial state and the final state is called change.
