Which of the following oxides of lodine is used for quantitative analysis of co2?
Correct answer: C. I2O5
- A. I2O4 (iodine tetroxide)
- B. I4O2 (iodine dioxide)
- C. I2O5
- D. All are equally useful
Explanation
The correct answer is (c) I2O5 (iodine pentoxide).Why I2O5 is used for CO2 analysis:I2O5 is a powerful oxidizing agent and reacts readily with CO2 to form CO2 and I2:I2O5 + 5CO2 -> 5CO + I2This reaction is used in quantitative analysis to determine the amount of CO2 present in a sample. The liberated iodine can be easily quantified, thus indirectly measuring the CO2 concentration.Why other options are not equally useful:I2O4 (iodine tetroxide): While it exists, I2O4 is a less stable and less powerful oxidizing agent than I2O5. Consequently, its reaction with CO2 is less efficient and not suitable for quantitative analysis.I4O2 (iodine dioxide): I4O2 is a weak oxidizing agent and doesn't readily react with CO2. Therefore, it's not used for CO2 analysis.Key points:The oxidizing properties of iodine oxides and their reactivity with CO2 vary significantly.I2O5 is the preferred choice for quantitative CO2 analysis due to its strong oxidizing power and convenient reaction with CO2.Other iodine oxides might have different applications or be less suitable for CO2 analysis due to their instability or weak oxidizing properties.
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Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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