Which of the following statement is or are incorrect? Mark as favorite Copy Link The simplest alkene is ethene having the molecular formula C2H4. The general formula of alkynes is CH2n +2 where n is the number of carbon atoms in one molecule of the alkyne. An unsaturated hydrocarbon in which the two carbon atoms are connected by a double bond is called an alkene. The unsaturated hydrocarbons are obtained mostly from petroleum by a process called cracking. Check Answer