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Manipal MET2019Chemistryp Block Elements (Group 15, 16, 17 & 18)

Ozone when reacts with potassium iodide solution liberates certain product, which turns starch paper blue. The liberated substance is

Options

  1. Aoxygen
  2. Biodine
  3. Chydrogen iodide
  4. Dpotassium hydroxide

Correct answer

B. iodine

Step-by-step solution

O ₃ (Ozone) works as oxidising agent. It reacts with potassium iodide (KI) solution and liberate iodine vapours that turns starch paper blue. aligned O ₃ & O ₂+ O & [2 KI + H ₂ O + O 2 KOH + I ₂] 2 KI + H ₂ O + O ₃ 2 KOH + I ₂+ O ₂ aligned

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