1) Which of the following compounds contains a hydroxyl group? a) CH₃CH₂COOH b) CH₃CH₂OH c) CH₃CH₂NH₂ d) CH₃CH₃ 2) What is the functional group in a ketone? a) -COOH b) -OH c) -C=O- d) -NH₂ 3) Which functional group is present in esters? a) -COOH b) -COO- c) -NH₂ d) -CHO 4) Which of the following is a carboxylic acid? a) CH₃CH₂OH b) CH₃COOH c) CH₃CH₃ d) CH₃CH₂NH₂ 5) An amide group contains which of the following? a) Carbon, hydrogen, and oxygen only b) Carbon, hydrogen, and nitrogen only c) Carbon, oxygen, and nitrogen d) Carbon and nitrogen only 6) Which of the following compounds contains an aldehyde group? a) CH₃COCH₃ b) CH₃CH₂OH c) CH₃CHO d) CH₃COOH 7) The functional group –NH₂ is found in: a) Alcohols b) Amines c) Amides d) Aldehydes 8) Which of these has the general structure R-O-R’? a) Alcohol b) Ether c) Ester d) Aldehyde 9) Which functional group is the most acidic? a) Alcohol b) Amine c) Carboxylic acid d) Ketone 10) What is the correct name for the –COOH functional group? a) Hydroxyl group b) Carboxyl group c) Carbonyl group d) Alkyl group

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