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Which pair of 3d M3+ ions are the strongest oxidising agents in water?
AMn3+ and Co3+
BSc3+ and Ti3+
CTi3+ and V3+
DCr3+ and Fe3+
Answer & Solution
Correct answer: A. Mn3+ and Co3+
The M3+/M2+ potentials of manganese and cobalt are the most positive, so these ions are the strongest oxidants.
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