Differentiate between primary haloalkane and secondary haloalkane?

In a primary haloalkane, the carbon involved in the halogen-carbon bond is bonded to one other carbon. In a secondary haloalkane, the carbon involved in the halogen-carbon bond is also bonded to two...

I think the difference between primary and secondary colours is that primary is a colour that is not the combination between two or more different colours while secondary colours have a mixture of...

a negative space

Primary or idiopathic dystonia is presumed to be of genetic or unknown cause, whereas secondary dystonias are due to an attributable cause.

Secondary DNS gets its records from the Primary DNS Server. The secondary DNS is essentially there in case the primary DNS doesn't respond.