Alkyl halides or haloalkanes are the organic compounds in which halogen atom is bonded to an alkyl group. The general formula of these compounds is R – X .

Haloalkanes are classified into primary, secondary and tertiary haloalkanes depending upon the number of carbon atoms to which halogen linked carbon is bonded.
1. Primary haloalkane ( 10 haloalkane) :
A haloalkane in which halogen linked carbon is bonded to none or one other carbon atom is known as primary haloalkane.

2. Secondary haloalkane ( 20 haloalkane) :
A haloalkane in which halogen linked carbon is further bonded to two other carbon atoms is known as secondary haloalkane.

3. Tertiary haloalkane ( 30 haloalkane) :
A haloalkane in which halogen linked carbon is further bonded to three other carbon atoms is known as tertiary haloalkane.
