Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. Mercury on glass
   2. Water on wax
   3. Water on plastic
   4. Water on a leaf

   Odd item

   Water on plastic

2. Items

   1. Free surface
   2. Surface energy
   3. Angle of contact
   4. Atomic number

   Odd item

   Atomic number

3. Items

   1. Sphere
   2. Least area
   3. Least energy
   4. Heavy drop

   Odd item

   Heavy drop

4. Items

   1. Waterproofing
   2. Detergent use
   3. Dying cloth
   4. Soaking cloth

   Odd item

   Waterproofing

Instructions

Tap the item that does not belong with the rest.

Explanation