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ChemistryNEET 2023Oxidation number and balancing redox equations

Redox Reactions

On balancing the given redox reaction,

a Cr2O72−+b SO32−(aq)+c H+(aq)→2a Cr3+(aq)+b SO42−(aq)+c2 H2O(l)a\,\mathrm{Cr_2O_7^{2-}} + b\,\mathrm{SO_3^{2-}(aq)} + c\,\mathrm{H^+(aq)} \rightarrow 2a\,\mathrm{Cr^{3+}(aq)} + b\,\mathrm{SO_4^{2-}(aq)} + \frac{c}{2}\,\mathrm{H_2O(l)}

the coefficients aa, bb and cc are found to be, respectively:

  1. A.1, 3, 8✓
  2. B.3, 8, 1
  3. C.1, 8, 3
  4. D.8, 1, 3

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

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