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When number of carbon is nine the root name in IUPAC is .

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Important Questions on Organic Chemistry- Some Basic Principles and Techniques

HARD
Which one of the following structures has the IUPAC name 3-ethynyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid?
EASY

The structure of a hydrocarbon is given below:

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(a) How many C- atoms are there in the main chain? Which is the word root? 
(b) Identify the branch and its position number? 
(c) Write the IUPAC name of this compound. 

EASY
What is the IUPAC nomenclature of isoprene monomers present in natural rubber?