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प्रश्न
Name the following.
A form of energy required for a chemical change.
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उत्तर
Generally, HEAT ENERGY is required but light, pressure, or electricity can also be needed.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
State the various conditions that favour the process of evaporation.
Define physical change. Give two examples for the above changes.
Tick (√) the correct alternative from the choice given for the following statement.
The compound rust is a hydrated oxide of
Tick the most appropriate answer.
Photosynthesis requires
Sublimation is classified as a physical change. Why ?
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
