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KVPY2015ChemistryRedox Reactions

The number of electrons required to reduce chromium completely in Cr ₂ O ₇ ²⁻ to Cr ³⁺ in acidic medium, is

Options

  1. A5
  2. B3
  3. C6
  4. D2

Correct answer

C. 6

Step-by-step solution

Cr ₂ O ₇²⁻+14 H ⁺+6 e ⁻ 2 Cr ³⁺+7 H ₂ O

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