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प्रश्न
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
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उत्तर
Glowing of an electric bulb is a PHYSICAL change as no change in the composition of filament takes place is reversible, the only filament glows when electricity is passed and returns to its original form on switching off the electric current.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Rusting of almirah
Write short answer.
Give two examples of periodic changes
State the various conditions that favour the process of evaporation.
State whether the following is physical or chemical changes.
shaping a piece of glass —
Write true or false
Rusting of iron is a chemical change.
A physical change is temporary. Explain.
Classify the following as physical or chemical change :
Growth of a plant
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Name the following.
A form of energy required for a chemical change.
