Which of the following compound is used for estimation of CO ?

Options

A. `I_(2)O_(5)`
B. `KI +H_(2)O`
C. `I_(2)`
D. `Cl_(2)O_(6)`

Answer

To solve the question of which compound is used for the estimation of carbon monoxide (CO), we will analyze the given options step by step.

### Step 1: Identify the compounds
The given compounds are:
1. I2O5
2. KI + H2O
3. I2
4. Cl2O6

### Step 2: Understand the context of the question
The question asks which compound is specifically used for estimating carbon monoxide. This involves a chemical reaction where the compound reacts with carbon monoxide to produce measurable products.

### Step 3: Analyze each compound
- **I2O5 (Iodine Pentoxide)**: This compound is known to react with carbon monoxide to produce carbon dioxide (CO2) and iodine (I2). This reaction allows for the estimation of carbon monoxide because the amount of CO can be determined based on the amount of CO2 produced.

- **KI + H2O (Potassium Iodide and Water)**: This combination does not have a known reaction for estimating carbon monoxide.

- **I2 (Iodine)**: While iodine can react with various substances, it is not specifically used for the estimation of carbon monoxide.

- **Cl2O6 (Chlorine Oxide)**: This compound is not typically associated with the estimation of carbon monoxide.

### Step 4: Conclusion
Based on the analysis, I2O5 is the only compound that is used for the estimation of carbon monoxide. The reaction it undergoes produces measurable products that allow for the quantification of CO.

### Final Answer
The compound used for the estimation of carbon monoxide is **I2O5** (Option A).

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