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JEE CHEMISTRY MCQ: HYDROGEN

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An inorganic compound liberates O2{\mathrm{O}_2} when heated, turns an acid solution of KI brown and reduces acidified KMnO4\mathrm{KMn}{\mathrm{O}_4}. The substance is:
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Correct option: A
H2O2{\mathrm{H}_2}{\mathrm{O}_2}
Option A (H2O2) is correct because H2O2 decomposes to release O2 when heated, turns KI solution brown (oxidation of I- to I2), and reduces KMnO4.

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