Unsaturated hydrocarbons contain multiple bonds between the two C-atoms and show addition reactions. Give the test to distinguish ethane from ethene.
Saturated hydrocarbons generally burn with a clean flame. Unsaturated hydrocarbons burn with yellow flame and produce lot of soot. So, when ethane is burnt, it burns with a clean flame and no soot is produced. When ethene is burnt, it burns with yellow flame and produces lot of soot.
