Which is most reactive metal

Options

A. Fe
B. Pt
C. Ni
D. Co

Explanation

To determine which is the most reactive metal among the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Reactivity Series**: The reactivity series is a list of metals arranged in order of decreasing reactivity. The most reactive metals are placed at the top, while the least reactive ones are at the bottom.

2. **Identify the Metals**: From the question, we need to identify the metals provided in the options. In this case, the metals mentioned are platinum, nickel, cobalt, and iron.

3. **Refer to the Reactivity Series**: According to the reactivity series, the order of reactivity for the metals mentioned is:
- Iron (Fe)
- Cobalt (Co)
- Nickel (Ni)
- Platinum (Pt)

4. **Determine the Most Reactive Metal**: From the order mentioned above, iron is the most reactive metal among the options provided. It reacts readily with oxygen and moisture in the environment, leading to rust formation.

5. **Conclusion**: Therefore, the most reactive metal among the given options is **Iron (Fe)**.

### Final Answer:
The most reactive metal is **Iron (Fe)**.

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