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प्रश्न
Explain the following type of chemical reaction, giving two examples for it:
Displacement reaction
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उत्तर
A displacement reaction occurs when a more active element displaces a less active element from a compound.
Examples:
- Zinc displaces copper from copper sulphate solution.
\[\ce{Zn + CuSO4_{(aq)} -> ZnSO4_{(aq)} + Cu}\] - Iron pieces when added to copper sulphate solution, copper is displaced.
\[\ce{Fe + CuSO4 → FeSO4 + Cu}\]
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संबंधित प्रश्न
What type of chemical reaction is represented by the following equation?
A2O3 + 2B → B2O3 + 2A
What type of reaction is represented by the following equation?
2Na + 2H2O → 2NaOH + H2
What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.
What happens when a zinc strip is dipped into a copper sulphate solution?
Write the equation for the reaction that takes place.
Fill in the blank.
The chemical change involving iron and hydrochloric acid illustrates a ...............reaction.
What is observed after about 1 hour of adding the strips of copper and aluminium separately to the ferrous sulphate solution filled in two beakers? Name the reaction if any change in colour is noticed. Also, write a chemical equation for the reaction.
Classify the following reaction into different type:
AgNO3(aq) + NaCl(aq) →AgCl(s) + NaNO3(aq)
Classify the following reaction into –
- Direct combination
- Decomposition
- Displacement
- Double decomposition
The reaction is – Zinc reacts with copper [II] sulphate to give zinc sulphate and copper.
Match the following
Identify the types of reactions.
| REACTION | TYPE |
| NH4OH(aq) + CH3COOH(aq) → CH3COONH4(aq) + H2O(l) | Single Displacement |
| Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s) | Combustion |
| \[\ce{ZnCO3_{(s)} + ->[Heat]ZnO_{(s)} + CO2_{(g)}}\] | Neutralization |
| C2H4(g) + 4O2(g) → 2CO2(g) + 2H2 O(g) + Heat | Thermal decomposition |
State the change in colour observed in following case mentioning the reason:
A piece of zinc is dipped in ferrous sulphate solution.
