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प्रश्न
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
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उत्तर
BURNING OF MAGNESIUM RIBBON is chemical change as It is
- Irreversible change
- New product with new properties is formed (MgO)
- It is a permanent change
- Composition is changed
- Energy is required to bring the change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Explain the following giving an example.
Pure substance
Write short answer.
What are man-made changes ?
Fill in the blank.
Growing of a seedling into a plant is _______ change.
Write true or false
Decomposition of leaves is a fast change.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Explain the term – ‘sublimation’. Is sublimation of naphthalene – a physical or a chemical change. Give reasons.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
