Question

The reaction \( \text{Zn} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2 \) is a:

• A. Combination reaction
• B. Displacement reaction
• C. Decomposition reaction
• D. Double displacement reaction

Hint:

In a displacement reaction, a more reactive element displaces a less reactive element from its compound.

Answer 1

The Correct Option is B

This reaction involves zinc (Zn) displacing hydrogen (H) from sulfuric acid (H\(_2\)SO\(_4\)), forming zinc sulfate (ZnSO\(_4\)) and hydrogen gas (\(H_2\)). This is a classic example of a displacement reaction, where one element displaces another from a compound.

Step 1: Combination reaction.
A combination reaction is one where two or more substances combine to form a single product. This does not apply here, so option (A) is incorrect.

Step 2: Displacement reaction.
In a displacement reaction, a more reactive element displaces a less reactive element from its compound. Here, zinc displaces hydrogen from sulfuric acid, forming zinc sulfate and hydrogen gas. Therefore, option (B) is correct.

Step 3: Decomposition reaction.
A decomposition reaction involves the breakdown of a compound into simpler substances, which does not occur in this reaction. So, option (C) is incorrect.

Step 4: Double displacement reaction.
A double displacement reaction involves the exchange of ions between two compounds, which is not the case here. Therefore, option (D) is incorrect.

Step 5: Conclusion.
The correct type of reaction is a displacement reaction, so the correct answer is (B).