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MHT CET202015 Oct 2020Evening ShiftChemistryRedox ReactionsActual

What is the oxidation number of Cr in K ₂ Cr ₂ O ₇ ?

Options

  1. A+2
  2. B+12
  3. C-6
  4. D+6

Correct answer

D. +6

Step-by-step solution

aligned K ₂ Cr ₂ O ₇ &=(1 2)+( x 2)+[(-2) 7] &=2+2 x -14 &=2 x -12 2 x &=12 x &=+6 aligned Oxidation number of Cr =+6

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