Question

give iupac name of the question

Answer 1

3-methyl 4-butyl octane.....may he

Answer 2

$\huge\red{Assalamualykum}$

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$\huge\green{IUPAC NAME}$

Its longest chain will be taken as parent chain .

So here in this question longest chain has 8 carbons

A methyl group is attached at carbon 3 and a butyl group is attached at carbon 4

So ......

Its name is :-

4_butyl_3_methyloctane
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As b comes first in alphabets so it will be written first while naming and then m comes after b in alphabets

So basic rule of naming substituent is that one that comes first in alphabets will be named first while naming a compound

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$\huge\pink{INSHALLAH it will help U}$