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प्रश्न
Classify the following changes as physical or chemical.
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उत्तर
- boiling — Physical
- curdling of milk — Chemical
- photosynthesis in plants — Chemical
- melting of a solid (wax) — Physical
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Write short answer.
What are man-made changes ?
State the various conditions that favour the process of evaporation.
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
True or false
Is melting of ice a reversible change?
Sublimation is classified as a physical change. Why ?
Classify the following as physical or chemical change :
Growth of a plant
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
