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MHT CET202526 Apr 2025Morning ShiftChemistryRedox ReactionsActual

In the equation, BiO ₃⁻+6 H ⁺+x ~ e ⁻ Bi ³⁺+3 H ₂ O What is the value of x ?

Options

  1. A2
  2. B3
  3. C4
  4. D6

Correct answer

A. 2

Step-by-step solution

Balancing the half-reaction BiO ₃⁻ + 6 H ⁺ + x~ e ⁻ Bi ³⁺ + 3 H ₂ O reveals that x = 2 through charge conservation or oxidation state analysis. The oxidation state of bismuth decreases from +5 in BiO ₃⁻ to +3 in Bi ³⁺ , indicating a gain of 2 electrons. Charge balancing confirms this result: the reactant side charge (-1 + 6 - x) must equal the product side charge (+3) , yielding 5 - x = 3 and thus x = 2 . Final answer: 2

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