Which of the following halogen oxide is used for estimation of carbon monoxide in automobile exhaust — p Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Iodine pentoxide (I2O5) reacts rapidly and quantitatively with carbon monoxide (CO) even at room temperature. Step 2: The reaction proceeds as: I2O5 + 5CO -> I2 + 5CO2. The liberated iodine can be titrated against standard sodium thiosulfate solution (iodometry). Step 3: Due to this quantitative reaction, I2O5 is widely used for the estimation of carbon monoxide in gas analysis, corresponding to option (b).