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प्रश्न
State whether the following is physical or chemical changes.
mixing oil with water —
उत्तर
physical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
A physical change is temporary. Explain.
Explain the term – ‘sublimation’. Is sublimation of naphthalene – a physical or a chemical change. Give reasons.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Select the correct answer from the choice given below to complete the sentence
The dissolution of lead nitrate in water is deemed as a _________ change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ 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.
Water is the universal solvent. Why?
