<span>Most molecules containing carbon are organic. All organic compounds, from basic elements through complex living creatures, contain some degree of carbon, which is one of the most basic components of any organic molecule.</span>
If you want an example then a car passing by a standing man is the best one !!
Eggshells are made primarily of calcium carbonate. The acid in vinegar softens the calcium of the eggshell. Adding a little vinegar to the water when boiling eggs is an old cook’s trick that makes them easier to peel.
A link to this experiment is below in the comment box