In the following half-reaction in basic medium,
${B i}^{3 +} (a q) ⟶ B i O_{3}^{-} (a q)$
one mole of ${B i}^{3 +}$ is equivalent to :

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Solution

${B i}^{3 +} (a q) ⟶ B i O_{3}^{-} (a q)$
+3 +5
Change in oxidation state is 2 so, one mole of it will have 2 equivalents.

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