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प्रश्न
What do you observe when :
a piece of paper is burnt
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उत्तर
On burning piece of paper produces carbon dioxide and ash is left behind. Is a chemical change.
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संबंधित प्रश्न
What do you observe when :
solid ammonium chloride is heated
Fill in the blank
Burning of fuel is a _______ change.
State whether the following is physical or chemical changes.
burning of wood -
State whether the following is physical or chemical changes.
Melting of wax —
Fill in the blank
An earthquake is a _______ change.
Melting of solid (wax) is a physical change.
Distinguish between the following.
Natural change and man-made change
Under which different types can the following changes be classified?
Bursting of a cracker.
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 _________.
How can a change occur in a substance?
