S3.2 Functional groups: Classification of organic compounds (SL)
15 revision questions with answers for S3.2 Functional groups: Classification of organic compounds (SL). Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Family of compounds with the same functional group, successive members differing by CH₂?
- Homologous seriesRight answer
- Isomeric series
- Functional series
- Polymer
What this set covers
Organic classification at SL: homologous series, functional groups, naming compounds such as propan-1-ol and ethanoic acid, structural isomers, index of hydrogen deficiency, and reading infrared, ¹H NMR and mass spectrum clues.
- Common mix-up
- Students often misclassify alcohols: propan-2-ol is secondary because the carbon bearing the OH is bonded to two other carbons, not because of its position in the name.
- Revision tip
- Draw the structures for propan-1-ol, propan-2-ol, ethanoic acid and an ester, circle each functional group, then predict one IR absorption for each.
All 15 questions and answers
Family of compounds with the same functional group, successive members differing by CH₂?
Answer: Homologous series
Name of the –COOH functional group?
Answer: Carboxyl
Homologous series with a C=O at the end of the chain, –CHO?
Answer: Aldehyde
Class of compound with the linkage R–COO–R′?
Answer: Ester
IUPAC name of CH₃CH₂CH₂OH?
Answer: Propan-1-ol
Classification of propan-2-ol as an alcohol?
Answer: Secondary
IUPAC name of CH₃COOH?
Answer: Ethanoic acid
General formula of the alkanes?
Answer: CₙH₂ₙ₊₂
Butane and methylpropane are an example of…?
Answer: Structural isomers
Name of the C₆H₅– group?
Answer: Phenyl
Index of hydrogen deficiency of C₆H₆?
Answer: 4
Bond responsible for a strong IR absorption near 1700 cm⁻¹?
Answer: C=O
Number of ¹H NMR signals for ethanol, CH₃CH₂OH?
Answer: 3
Reference compound that gives the 0 ppm signal in ¹H NMR?
Answer: Tetramethylsilane
Fragment ion responsible for a peak at m/z = 15?
Answer: CH₃⁺
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.