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प्रश्न
Give an example of the following chemical changes.
A reaction involving blue solution.
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उत्तर
\[\ce{\underset{[iron]}{Fe} + \underset{[blue solution]}{CuSO4_{(aq)}} ->\underset{[green solution]}{FeSO4} + \underset{(brown/red deposit)}{\underset{[copper]}{Cu}}}\]
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संबंधित प्रश्न
Explain the term with examples.
Endothermic reaction
Identify the endothermic and exothermic reaction.
HCl + NaOH → NaCl + H2O + heat
Give an example of the following chemical changes.
An exothermic and an endothermic reaction involving carbon as one of the reactants.
State which type of chemical reaction proceeds with the absorption of heat energy.
State the following reaction whether heat is evolved or absorbed –
Two neutral gases combine to give a basic gas.
Give an example with a balanced equation, of the following reaction:
photochemical reaction
Give an example with a balanced equation, of the following reaction:
electrochemical reaction
Respiration is a ______ change.
Match the following:
| Colum I | Column II | ||
| 1. | Alloying | a. | Exothermic change |
| 2. | Crystallization | b. | Periodic change |
| 3. | Soap powder + water | c. | Mixing of molten solids |
| 4. | Seasonal changes | d. | Pure solid |
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
