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What does hydrogen peroxide liberate from potassium iodide?

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in Chemistry – Class 11 by (148k points)
What does hydrogen peroxide liberate from potassium iodide?

(a) Nitrogen

(b) Potassium

(c) Iodine

(d) Hydrogen

I had been asked this question in a national level competition.

I would like to ask this question from Hydrogen Peroxide (H2O2) topic in chapter Hydrogen of Chemistry – Class 11

1 Answer

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Best answer
Correct answer is (c) Iodine

The explanation: When 2 moles of potassium iodide are reacted with 1 mole of hydrogen peroxide, 2 moles of potassium hydroxide and one mole of iodine is liberated. That means hydrogen peroxide liberates iodine from acidified potassium iodide.

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