Most powerful oxidant among halogens and most powerful reductant among halide ions are 

Options

A. `F_2, F^(-)`
B. `F_(2), I^(-)`
C. `I_(2),I^(-)`
D. `I_(2), F^(-)`

Answer

To solve the question regarding the most powerful oxidant among halogens and the most powerful reductant among halide ions, we can follow these steps:

### Step 1: Identify the Halogens
The halogens are elements in Group 17 of the periodic table. They include:
- Fluorine (F)
- Chlorine (Cl)
- Bromine (Br)
- Iodine (I)

### Step 2: Determine the Most Powerful Oxidant
An oxidant is a substance that gains electrons and is reduced in a chemical reaction. Among the halogens, we need to determine which one is the strongest oxidizing agent.

- **Fluorine (F2)** is known to be the strongest oxidizing agent among the halogens. This is because:
- It has a high standard reduction potential.
- It has a small atomic size, which allows it to accept electrons readily.
- It has high electronegativity and low dissociation energy.

The standard electrode potential for the reduction of fluorine is:
\[ \text{F}_2 + 2e^- \rightarrow 2\text{F}^- \]
with a standard reduction potential of +2.87 volts.

### Step 3: Identify the Halide Ions
The halide ions are the anions formed from halogens:
- Fluoride (F^-)
- Chloride (Cl^-)
- Bromide (Br^-)
- Iodide (I^-)

### Step 4: Determine the Most Powerful Reductant
A reductant is a substance that loses electrons and is oxidized in a chemical reaction. Among the halide ions, we need to determine which one is the strongest reducing agent.

- **Iodide (I^-)** is the strongest reductant among the halide ions. This is because:
- It is the largest ion among the halides, which makes it less electronegative.
- It has a greater tendency to lose electrons compared to the other halide ions.

### Conclusion
- The most powerful oxidant among halogens is **Fluorine (F2)**.
- The most powerful reductant among halide ions is **Iodide (I^-)**.

### Final Answer
The correct answer is:
- **Fluorine (F2)** as the most powerful oxidant among halogens.
- **Iodide (I^-)** as the most powerful reductant among halide ions.

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