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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
State the various conditions that favour the process of evaporation.
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Solve this crossword by using the clues that follow-
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1 . It is the change that takes place in case of swinging pendulum of a clock. –
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change.
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
What is a physical change ? Give two examples of physical changes.
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
Select the chemical changes from the following list of changes
Respiration in mammals.
Select the chemical changes from the following list of changes
Butter turning rancid
When solute is dissolved in a solvent it forms a solution.
