Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. Corrosion
   2. Exothermic
   3. Endothermic
   4. Heat evolved

   Odd item

   Corrosion

2. Items

   1. Heat
   2. Light
   3. Electricity
   4. Sound

   Odd item

   Sound

3. Items

   1. Antioxidant
   2. Air tight tin
   3. Nitrogen flush
   4. Open dish

   Odd item

   Open dish

4. Items

   1. Gains oxygen
   2. Oxidised
   3. Copper to oxide
   4. Loses oxygen

   Odd item

   Loses oxygen

Instructions

Tap the item that does not belong with the rest.

Explanation