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प्रश्न
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
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उत्तर
Wax [CxHy]
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संबंधित प्रश्न
Write short answer.
Sublimation is classified as a physical change. Why ?
State the various conditions that favour the process of evaporation.
State whether the following is physical or chemical changes.
shaping a piece of glass —
State whether the following is physical or chemical changes.
Slaking of lime —
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Ice kept in a beaker, slowly melts and turns into water. The water in the beaker on solidification is freezing turns back to ice. Give four reasons why the change from ice to water and water back to ice is considered a physical change.
Select the chemical changes from the following list of changes
Drying of a fruit
Select the chemical changes from the following list of changes
Change of seasons
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
