The selected parent chain is numbered using Arabic numericals and the position of alkyl groups are
indicated by the no. of c-atom to which the alkyl group is attached. The numbering is done in such a way that the substituted c-atoms have the lowest possible numbers. When series of the locants are present then
the numbering of the chain is done is different ways and the position of the locants are compared terms by term.
The series which contains the lowest no. on the occasion of first difference represent the selected chain.
(i) Given correct IUPAC name for -

Text Solution
Verified by ExpertsB,D
(i)
Sol. 3-methylbutene
(ii)
Sol. 2,7,8- trimethyl decane
(iii)
Sol. 2,4,5- trimethyl hexane
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