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प्रश्न
State whether the following is physical or chemical changes.
burning of wood -
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उत्तर
chemical change,
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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
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.
Boiling of an egg —
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.
Give reason.
While purchasing canned food, its expiry date should be checked.
Give reason.
A dry handkerchief gets wet at once on dipping in water, but it takes longer for a wet handkerchief to dry.
How can a change occur in a substance?
