Identify the functional group in the following compound: C₂H₅Cl. Give its IUPAC name and common name.

(i) The functional group in C₂H₅Cl is chlorine.
(ii)    CH₃CH₂Cl contains 2 carbon atoms and is therefore to be named as the derivative of ethane (C₂H₆).
(iii)    Since only one chlorine atom is bonded by a single covalent bond to the carbon atom of an ethyl group, so the prefix monochloro is to be added before the parent alkane.
(iv)    The structural formula of CH₃CH₂Cl is


Common name: Ethyl chloride. IUPAC name: Monochloro ethane.