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प्रश्न
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
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उत्तर
Is a chemical change as sulphur (yellowish-green) on burning produces SO2 gas which is acidic in nature and a new substance with new properties is formed
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संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
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State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Classify the following changes as physical or chemical.
Classify the following as physical or chemical change :
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Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
Grinding of wheat grain changes its size. It is a ____________ change.
Cutting a log of wood into pieces is a chemical change.
Adding sugar to milk is a physical change.
