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MHT CET202611 April 2026Evening ShiftChemistryRedox ReactionsActual

Find the oxidation number of Cl in ClO ₄⁻¹

Options

  1. A-9
  2. B+7
  3. C-7
  4. D+9

Correct answer

B. +7

Step-by-step solution

Let the oxidation number of Cl be x . The oxidation number of oxygen is generally -2 . The sum of oxidation numbers of all atoms in a polyatomic ion is equal to its net charge. x + 4(-2) = -1 x - 8 = -1 x = +7 Answer: +7

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