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प्रश्न
State whether the following is physical or chemical changes.
shaping a piece of glass —
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उत्तर
physical change,
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संबंधित प्रश्न
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Write true or false for the statement.
Deforestation is a man-made change
Chemical changes are accompanied by changes in energy.
State whether the following is physical or chemical changes.
glowing of a bulb -
Photosynthesis cannot take place at night.
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
Gas exists in three states as solid, liquid, and gas.
