Which one of the following reactions of xenon compounds is not feasible ?

Options

A. `XeO_(3) + 6HF to XeF_(6) + 3H_(2)O`
B. `3XeF_(4) + 6H_(2)O to 2Xe + XeO_(3) + 12HF + 1.5O_(2)`
C. `2XeF_(2) + 2H_(2)O to 2Xe + 4HF + O_(2)`
D. `XeF_(6) + RbF to Rb [XeF_(7)]`

Answer

To determine which reaction of xenon compounds is not feasible, we will analyze each of the four given reactions step by step.

### Step 1: Analyze the First Reaction
The first reaction is:
\[ \text{XeO}_3 + \text{HF} \rightarrow \text{XeF}_6 + 3\text{H}_2\text{O} \]

**Analysis:**
- Xenon trioxide (XeO3) is treated with hydrofluoric acid (HF) to produce xenon hexafluoride (XeF6) and water.
- However, xenon fluorides, including XeF6, are known to hydrolyze easily. This means that once XeF6 is formed, it can quickly react with water to revert back to xenon oxides.
- Therefore, while the reaction can occur, it is not feasible in the forward direction because the product (XeF6) will hydrolyze back to the reactant (XeO3).

### Step 2: Analyze the Second Reaction
The second reaction is:
\[ \text{XeF}_2 + 6\text{H}_2\text{O} \rightarrow \text{XeO}_3 + 2\text{HF} \]

**Analysis:**
- This reaction involves the hydrolysis of xenon difluoride (XeF2) with water.
- Hydrolysis of xenon fluorides is a feasible reaction, leading to the formation of xenon oxides and hydrofluoric acid.
- Thus, this reaction is feasible in the forward direction.

### Step 3: Analyze the Third Reaction
The third reaction is:
\[ \text{XeF}_4 + 2\text{H}_2\text{O} \rightarrow \text{XeO}_2 + 4\text{HF} \]

**Analysis:**
- Similar to the second reaction, this involves the hydrolysis of xenon tetrafluoride (XeF4).
- The product formed here is also a xenon oxide, which indicates that this reaction is feasible in the forward direction.

### Step 4: Analyze the Fourth Reaction
The fourth reaction is:
\[ \text{XeF}_6 + \text{RBF} \rightarrow \text{Stable Compound} \]

**Analysis:**
- In this reaction, xenon hexafluoride (XeF6) is treated with a stable compound (RBF).
- Since the product formed is a stable compound, this reaction is feasible in the forward direction.

### Conclusion
Among the four reactions analyzed, the first reaction is the only one that is not feasible in the forward direction due to the hydrolysis of the product back to the reactant.

### Final Answer
The reaction that is not feasible is:
\[ \text{XeO}_3 + \text{HF} \rightarrow \text{XeF}_6 + 3\text{H}_2\text{O} \]

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