Identify the functional group in the following compound: CH₂Cl₂ Give its common name and IUPAC name.

(i) The functional group in CH₂Cl₂ is chlorine.

(ii)  CH₂Cl₂ has one carbon atom and has to be named as the derivative of methane.

(iii) CH₂Cl₂ contains 2 chlorine atoms, therefore the prefix dichloro- is to be added to the parent alkane, methane.

(iv)Therefore, IUPAC name is dichloromethane. Common name is methylene dichloride.