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प्रश्न
State whether the following is physical or chemical changes.
lightning —
उत्तर
chemical change,
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संबंधित प्रश्न
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Which of the following are physical changes and which are chemical changes ?
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
Give four difference between physical and chemical changes.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
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.
Sublimation of Iodine is a ______.
Give two examples for each of the following cases:
Physical changes are reversible.
