🔁 Displacement Reaction 1

 Certainly, Mayank! Here's the enhanced explanation of Displacement Reaction with a hands-on activity integrated — perfect for engaging Class 10 students and aligned with CBSE guidelines.

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🔁 Displacement Reaction

(Class 10 – Chapter 1: Chemical Reactions and Equations)

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🎯 Definition:

A displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its salt solution.

✅ It is a type of single displacement reaction.

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🧪 General Reaction Format:

$$A + BC \rightarrow AC + B$$

• Where A is more reactive than B, so it replaces B from the compound BC.

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📘 Example:

$$\text{Fe (s)} + \text{CuSO}_4 (aq) \rightarrow \text{FeSO}_4 (aq) + \text{Cu (s)}$$

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🧪 Activity: Displacement Reaction Between Iron and Copper Sulphate

✅ Objective:

To observe a displacement reaction using iron and copper sulfate solution.

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🧰 Materials Required:

• Iron nail

• Copper sulfate solution (blue)

• Beaker

• Sandpaper

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🔬 Procedure:

1. Clean the iron nail with sandpaper to remove rust.

2. Pour copper sulfate solution into a beaker.

3. Drop the iron nail into the solution and leave it undisturbed for 15–20 minutes.

4. Observe any colour change or deposition.

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👁️ Observation:

• The blue colour of CuSO₄ fades.

• A reddish-brown layer (copper metal) forms on the iron nail.

• The solution turns light green (formation of FeSO₄).

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🧪 Chemical Equation:

$$\text{Fe} (s) + \text{CuSO}_4 (aq) \rightarrow \text{FeSO}_4 (aq) + \text{Cu} (s)$$

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📌 Explanation:

• Iron is more reactive than copper.

• It displaces copper from copper sulfate to form iron sulfate and copper metal.

• This is a displacement reaction.

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🧠 More Examples:

Reaction	Observation
Zn + CuSO₄ → ZnSO₄ + Cu	Zinc replaces copper, blue fades
Cl₂ + 2KBr → 2KCl + Br₂	Chlorine displaces bromine (reddish gas)
Mg + HCl → MgCl₂ + H₂↑	Hydrogen gas evolves

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📚 CBSE Exam Tip:

Q: What is a displacement reaction? Write a balanced chemical equation with an activity.

✅ Answer:
A displacement reaction is one in which a more reactive element displaces a less reactive element from its compound.

Activity Example:
Iron nail + CuSO₄ → Iron displaces copper.

$$\text{Fe} + \text{CuSO}_4 \rightarrow \text{FeSO}_4 + \text{Cu}$$

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🎤 Final Thought for Students:

“Displacement reactions prove that in chemistry, reactivity matters — the more powerful element always takes the lead!”

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