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Functional Group Priorities

Enter organic chemistry functional groups from highest to lowest priority (not including anhydrides). Please leave a comment if anything is incorrect/unclear. Appreciated!
Quiz by
reylien
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Last updated: December 6, 2025
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First submittedDecember 3, 2025
Times taken6
Average score18.5%
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Functional Group
Carboxylic Acid
Ester
Acid Halide
Amide
Nitrile
Aldehyde
Ketone
Alcohol
Thiol
Amine
Arene
Alkene
Alkyne
Alkane
Ether
Alkyl Halide
Nitro
Structure
-COOH
-COOR
-COX
-CONH2
C≡N
-CHO
C=O
-OH
-SH
-NH2
-C6H5
C=C
C≡C
-R
-O-
C-X
-NO2
Prefix
carboxy-
[alk]oxycarbonyl-
[hal]ocarbonyl-
amido-
cyano-
formyl-
oxo-
hydroxy-
mercapto-
amino-
phenyl-
[alk]enyl-
[alk]ynyl-
[alk]yl
[alk]oxy-
[hal]o-
nitro-
Suffix
-oic acid
-oate
-oyl [hal]ide
-amide
-nitrile
-al
-one
-ol
-thiol
-amine
-benzene
-ene
-yne
-ane
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1 Comments
+1
Level 44
Mar 15, 2026
Great quiz. Could maybe add Imines, and for thiols could sulfanyl be allowed for the prefix?