Question

if methyl and ethyl are present in an organic compound then how we number the longest carbon chain​

Answer 1

IUPAC is a systematic method for the naming of many organic compounds.  

Organic compound names are based on the number of carbon atoms present in the longest continuous chain.  

Explanation:

• All organic compounds are made up of carbon atoms.  
• Organic compounds are named based on the number of carbon atoms in the compound.  
• Example - The name of alkanes containing twelve carbon atoms is dodecane.  

Code No. of carbons

meth ------------1

eth----------------2

prop--------------3

but --------------- 4

pent---------------5

hex-----------------6

Learn more:

1) Expand the meaning of IUPAC:

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2) What is the longest carbon chain:

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