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प्रश्न
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
What do you observe when :
solid ammonium chloride is heated
What do you observe when :
a spoon of sugar is heated in a pan
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.
Under which different types can the following changes be classified?
Occurrence of an earthquake.
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 blanks with the appropriate words of the statement given below:
Chemical changes may involve exchange of energy in the form of __________ and _________.
Paper, LPG, CNG petrol, etc, are ______ substances.
