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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:
Melting of butter in a pan
Classify the following as chemical or physical change:
Making a fruit salad with raw fruits
Fill in the blank.
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State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
What will you take into account while identifying the following?
A physical change in a substance.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Select the chemical changes from the following list of changes
Breaking of glass
