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प्रश्न
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.
पर्याय
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
उत्तर
Both A and R are true but R is not the correct explanation of A.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
Write short answer.
Give an example of desirable change which can also be undesirable
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
The rusting of an iron object is called :
Fill in the blank.
The reaction in which energy is evolved is called
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
