Spot the outsider in each row

Exercise and reference answers

Questions

1. Items

   1. Sc3+
   2. Ti4+
   3. Zn2+
   4. V2+

   Odd item

   V2+

2. Items

   1. CN-
   2. I-
   3. Br-
   4. Cl-

   Odd item

   CN-

3. Items

   1. Primary valency
   2. Secondary valency
   3. Oxidation state
   4. Ionisable

   Odd item

   Secondary valency

4. Items

   1. Cisplatin
   2. Cis isomer
   3. Trans isomer
   4. Anti cancer drug

   Odd item

   Trans isomer

Instructions

In each row three entries share one property of a complex. Tap the one that does not.

Explanation