The answer to the riddle is "calcium hydroxide." When soccer players slide across the lines on the field, they often encounter chalk, which is primarily composed of calcium carbonate. When dusting off the chalk, one could playfully refer to "dusting off" calcium hydroxide, which is also related to chalk and is a base. The other options (ammonium hydroxide, zinc hydroxide, and potassium hydroxide) do not have a direct connection to the concept of a line on a soccer field.
While playing soccer, Carla slides across one of the lines on the field. When she stands up, what base does she dust off?
calcium hydroxide
ammonium hydroxide
zinc hydroxide
potassium hydroxide
1 answer