Question

The iodine oxide which is used in the estimation of carbon monoxide is:

• A. \( I_2O_4 \)
• B. \( I_2O_5 \)
• C. \( I_2O_7 \)
• D. \( I_2O \)

Hint:

- \( I_2O_5 \) is a strong oxidizer and is used in CO estimation.
- The reaction produces \( CO_2 \) and iodine, which can be detected easily.
- Other iodine oxides like \( I_2O_4 \) and \( I_2O_7 \) do not have a significant role in CO estimation.

Answer 1

The Correct Option is B

Step 1: Understanding Iodine Oxides 
- Iodine forms several oxides, including \( I_2O_4, I_2O_5, I_2O_7, \) and \( I_2O \). 
- Among these, \( I_2O_5 \) is widely used for the estimation of carbon monoxide (CO) in air due to its strong oxidizing properties. 

Step 2: Reaction of \( I_2O_5 \) with CO \[ I_2O_5 + 5CO \rightarrow I_2 + 5CO_2 \] 
- This reaction is used to quantify carbon monoxide, as \( CO_2 \) is formed stoichiometrically. 

Step 3: Eliminating Other Options 
- \( I_2O_4 \), \( I_2O_7 \), and \( I_2O \) do not play a major role in CO estimation.

Step 4: Conclusion 
- Since \( I_2O_5 \) is the most suitable oxide for CO detection, the correct answer is Option (2).