Each of the given beakers contains two metal strips of same size fastened together and immersed in hydrochloric acid. After some time, which beaker will contain the least amount of zinc ions?

Options

A.
B.
C.
D.

Explanation

To solve the question, we need to analyze the reactivity of the metals involved and how they interact with hydrochloric acid (HCl). The question asks which beaker will contain the least amount of zinc ions after the reaction has taken place.

### Step-by-Step Solution:

1. **Identify the Metals**: We have two metal strips in each beaker, and we need to consider their reactivity with hydrochloric acid. The metals mentioned are magnesium and zinc.

2. **Understand Reactivity**: Reactivity series indicates that magnesium is more reactive than zinc. This means that magnesium will react more readily with hydrochloric acid compared to zinc.

3. **Reaction with Hydrochloric Acid**: When magnesium reacts with hydrochloric acid, it will produce magnesium ions and hydrogen gas. The reaction can be represented as:
\[ \text{Mg} + 2\text{HCl} \rightarrow \text{Mg}^{2+} + 2\text{Cl}^- + \text{H}_2 \]
Zinc will also react with hydrochloric acid, producing zinc ions and hydrogen gas:
\[ \text{Zn} + 2\text{HCl} \rightarrow \text{Zn}^{2+} + 2\text{Cl}^- + \text{H}_2 \]

4. **Comparing the Reactions**: Since magnesium is more reactive than zinc, in a beaker where magnesium is present, it will react with hydrochloric acid first and more vigorously than zinc. This means that in the beaker with magnesium, zinc will not have the opportunity to react as much because the magnesium will consume the acid.

5. **Conclusion**: Therefore, the beaker that contains magnesium along with zinc will have the least amount of zinc ions produced because the magnesium will react with the hydrochloric acid before zinc can react significantly.

### Final Answer:
The beaker containing magnesium will have the least amount of zinc ions.

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