Question

What element do all organic compounds contain?

Answer 1

Hint :If we know the definition of organic compound we can answer this easily. We know that organic compounds are the compounds in solid, liquid or gaseous state which contain carbon in its molecule.

Complete Step By Step Answer:
From the definition of organic compounds, that is organic compounds, one of the large classes of chemical compounds in which one or more carbon atoms are covalently paired with other elements atoms, most commonly hydrogen, oxygen, or nitrogen.
Hence all organic compounds contain carbon. (It also contain hydrogen unless it has been replaced by another element)
Example: Methane, $ C{H_4} $ is the simplest organic compound. The hydrogen atoms in methane can be replaced by other elements.
Methane plus chlorine produces carbon tetrachloride, or tetrachloromethane. Even though carbon tetrachloride does not have hydrogen, it is still organic. Carbon tetrachloride is an organic solvent.
 $ C{H_4} + 2C{l_2} \to CC{l_4} $

Note :
Organic molecules are used in a variety of industries in human society, including food, pharmaceuticals, fuels and building, to name but a few. Organic compounds are essential because they contain carbon in all living organisms. Organic compounds are classified into open chain compounds and cyclic compounds.