Spot the intruder

Exercise and reference answers

Questions

1. Items

   1. H2O
   2. NH3
   3. HF
   4. CH4

   Odd item

   CH4

2. Items

   1. Ionic
   2. Dative
   3. Covalent
   4. Buoyant

   Odd item

   Buoyant

3. Items

   1. Nitrogen
   2. Oxygen
   3. Fluorine
   4. Carbon

   Odd item

   Carbon

Instructions

Three belong together. Tap the one that does not.