Spot the odd one out

Exercise and reference answers

Questions

1. Items

   1. Coordination number
   2. Oxidation number
   3. Counter ion

   Odd item

   Counter ion

2. Items

   1. [Ni(CO)₄]
   2. [Co(NH₃)₆]³⁺
   3. [PtCl₆]²⁻

   Odd item

   [Ni(CO)₄]

3. Items

   1. Sigma bond
   2. Coordination sphere
   3. Pi bond

   Odd item

   Coordination sphere

Explanation