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प्रश्न
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
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उत्तर
Heating a piece of iron is considered a physical change while heating a piece of coal [carbon] is considered a chemical change.
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Chemical changes are accompanied by changes in energy.
Write short answer.
Name two reversible changes.
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
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.
