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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.
विकल्प
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.
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उत्तर
Both A and R are true but R is not the correct explanation of A.
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
State whether the following is physical or chemical changes.
glowing of a bulb -
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
True or false
Change of seasons is a non-periodic change.
Sublimation is classified as a physical change. Why ?
Classify the following as physical or chemical change :
Formation of curd from milk
State the observations seen, when milk in a dish is kept aside for a few hours or more. Is the change which occurs – a physical change or a chemical change. Give reasons.
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Select the chemical changes from the following list of changes
Boiling of milk.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
