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प्रश्न
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
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उत्तर
The crystallisation of salt from its solution is a PHYSICAL change as only state changes (crystals are formed), the composition does not change, is reversible, no change in mass takes place.
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संबंधित प्रश्न
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Write short answer.
What are man-made changes ?
Classify the following changes as physical or chemical:-boiling
State whether the following is physical or chemical changes.
lightning —
Give two examples of periodic changes.
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ change.
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.
