Bromides contained in hot mother liquor is treated with ______________ during manufacture of bromine from sea water ?
Correct answer: D. Cl2
- A. SO3
- B. SO2
- C. NH3
- D. Cl2
Explanation
Chlorine oxidizes bromide ions in the hot mother liquor to liberate elemental bromine: 2Br⁻ + Cl₂ → Br₂ + 2Cl⁻. Sulphur dioxide would act as a reducing agent rather than release bromine.
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