The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of nomenclature is :

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

$- COOR > - COCl > - {NH}_{2} >> C = o$

$- COOH > - COOR > - {CONH}_{2} > - COCl$

$- COOH > - {CONH}_{2} > - COCl > - CHO$

$- {SO}_{3} H > - COCl > - {CONH}_{2} > - CN$

answer is B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The correct decreasing order of priority of functional groups for naming an organic compound in the IUPAC system, as per the table provided, is:

Carboxylic Acid > Ester > Acid Halide > Amide > Nitrile > Aldehyde > Ketone > Alcohol > Thiol > Amine > Benzene (Arene) > Alkene > Alkyne > Alkane > Ether > Alkyl Halide > Nitro

As a numbered list:

Carboxylic Acid
Ester
Acid Halide
Amide
Nitrile
Aldehyde
Ketone
Alcohol
Thiol
Amine
Benzene (Arene)
Alkene
Alkyne
Alkane
Ether
Alkyl Halide
Nitro

This order ensures that when naming a compound, the highest priority group is selected as the principal functional group for the parent name, and others are treated as substituents. This IUPAC ranking is crucial for systematic nomenclature in organic chemistry.

Watch 3-min video & get full concept clarity