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NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice

In chromite ore, the oxidation number of iron and chromium are respectively.

Options

  1. A+3,+2
  2. B+3,+6
  3. C+2,+6
  4. D+2,+3

Correct answer

D. +2,+3

Step-by-step solution

Actual composition of chromite ore ( F e C r 2 O 4 ) is FeO. C r 2 O 3 . In FeO, the oxidation state of Fe is +2 while in C r 2 O 3 , the oxidation state of Cr is +3.

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