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JEE Main202324 Jan 2023Morning ShiftChemistryCoordination CompoundsActual

The primary and secondary valencies of cobalt respectively in Co ( NH 3 ) 5 Cl Cl 2 are:

Options

  1. A3 and 5
  2. B2 and 6
  3. C2 and 8
  4. D3 and 6

Correct answer

D. 3 and 6

Step-by-step solution

Co ( NH 3 ) 5 Cl Cl 2 The primary valency is the ionisable valency. Oxidation number of Co is + 3 . So, primary valency is 3 . Secondary valency refers the coordination number. It is an octahedral complex so, secondary valency is 6.

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