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Question
A substance with which conc. hydrochloric acid reacts to liberate chlorine is ______.
Options
PbO
PbCl2
PbO2
Pb3O4
MCQ
Fill in the Blanks
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Solution
A substance with which conc. hydrochloric acid reacts to liberate chlorine is PbO2.
Explanation:
Lead dioxide (PbO2) is a powerful oxidizing agent containing lead in its +4 oxidation state. It readily oxidizes the chloride ions of concentrated HCl to liberate greenish-yellow chlorine gas (Cl2).
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