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Question:
Respected sir, i am stuck with this question kindly help me out draw the iupac nomenclature of 4(1,1 dimethyl ethyl)3 ethyl 4-7 dimethyl decane
Answer:

Refer to the above structure. The hydrocarbon chain consists of 10 carbon fropus in the backbone. So it is a decane. At the 4th carbon atom of this chain, there is 1 methyl group on top, and another ethyl group (in the box) attached to 2 methyl groups. And at the 3rd position there is an ethyl group. 

This is how it gets its IUPAC name.

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