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प्रश्न
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
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उत्तर
FeSO4 (Iron Sulphate)
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संबंधित प्रश्न
Write short answer.
Sublimation is classified as a physical change. Why ?
A physical change is temporary. Explain.
True or false
Dissolving of a solid in liquid is a physical change.
Classify the following changes as physical or chemical.
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
Differentiate between a physical change and a chemical change with reference to – Formation of products.
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
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.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
