RULES are followed while naming the compounds and it is different for different functional groups.The rules are known as IUPAC rules.Explanation:The priority of the functional groups is decided first.The sequence is given as follows:After deciding the priority of the group, substituents are numbered alphabetically.In Cyclic compounds, the ring is the parent chain unless it is ATTACHED to a larger chain.The ALKANE has a higher priority than ether.Here, the parent chain is CYCLOHEXANE as it is a six-membered ring.While numbering in the substituents in hexane compound 1-position goes to ethoxy as 'e' comes first in alphabetical letter and 2- position to nitro.IUPAC NAME of this compound will be:1-ethoxy-2-nitrocyclohexaneDo not go with 2-ethoxy-1-nitrocyclohexane as 'e' (ethoxy) comes first then 'n' (nitro).