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How many electrons are removed from Cr2- when it is oxidized to CrO42-?

Chemistry
WAEC 1998

How many electrons are removed from Cr2- when it is oxidized to CrO42-?

  • A. o
  • B. 2
  • C. 4
  • D. 8
  • E. 10
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Correct Answer: Option D
Explanation

from Cr2- to CrO42- involves 8 electrons to give oxidation state of Cr is +6

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