Preparation of zinc sulphate by the action of dilute sulphuric acid on zinc metal is called

Options

A. direct combination.
B. displacement reaction.
C. decomposition.
D. double decomposition.

Answer

To answer the question regarding the preparation of zinc sulfate by the action of dilute sulfuric acid on zinc metal, we will analyze the reaction step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are zinc metal (Zn) and dilute sulfuric acid (H₂SO₄).

2. **Write the Chemical Equation**:
- The reaction can be represented by the following chemical equation:
\[ \text{Zn (s)} + \text{H}_2\text{SO}_4 (aq) \rightarrow \text{ZnSO}_4 (aq) + \text{H}_2 (g) \]
- Here, zinc reacts with sulfuric acid to form zinc sulfate and hydrogen gas.

3. **Determine the Type of Reaction**:
- This reaction is classified as a **displacement reaction**. In this type of reaction, a more reactive metal (zinc) displaces a less reactive element (hydrogen) from its compound (sulfuric acid).

4. **Refer to the Reactivity Series**:
- The reactivity series of metals indicates that zinc is more reactive than hydrogen. Therefore, zinc can displace hydrogen from sulfuric acid, confirming that the reaction is indeed a displacement reaction.

5. **Conclusion**:
- The preparation of zinc sulfate by the action of dilute sulfuric acid on zinc metal is called a **displacement reaction**.