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प्रश्न
Explain in brief the involvement of energy in physical and chemical changes.
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उत्तर
Involvement of energy in physical and chemical changes
- Physical changes use energy to change the state of matter,
- Chemical changes release or absorb energy when changing a substance into a new substance.
Energy is released during the decomposition of a substance while energy is absorbed during the formation of a new substance.
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
burning of wood -
State whether the following is physical or chemical changes.
Melting of wax —
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
What role does energy play in initiating a chemical change ?
Distinguish between the following.
Natural change and man-made change
Under which different types can the following changes be classified?
Conversion of milk into yoghurt.
Under which different types can the following changes be classified?
Occurrence of an earthquake.
How can a change occur in a substance?
______ is the process in which something becomes different from what it was earlier.
