Ozone
Ozone turns moist starch-iodide paper blue because it:
Select the correct option:
Solution
oxidizes iodide ions to iodine
The test is based on the oxidizing nature of ozone. O3 oxidizes I- from KI to I2, and the liberated iodine forms a blue complex with starch. This color change confirms the oxidizing action of ozone on iodide ions.
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More ozone Practice Questions
About This Question
- Subject
- chemistry
- Chapter
- p-block elements
- Topic
- ozone
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
oxidizes iodide ions to iodine
The test is based on the oxidizing nature of ozone. O3 oxidizes I- from KI to I2, and the liberated iodine forms a blue complex with starch. This color change confirms the oxidizing action of ozone on iodide ions.
This easy difficulty chemistry question is from the chapter p-block elements, covering the topic of ozone. It appeared in the 2025 exam.
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