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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
Changes in which only ______ properties of a substance change are called physical changes.
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Define physical change. Give two examples for the above changes.
Fill in the blank.
Growing of a seedling into a plant is _______ change.
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
Select the chemical changes from the following list of changes
Butter turning rancid
