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Multiple Choice
Which functional group is characterized by a molecule composed mostly of carbon and hydrogen atoms with an attached group?
A
Carboxylic acid
B
Aldehyde
C
Alcohol
D
Ketone
Verified step by step guidance
1
Identify the key features described: a molecule mostly composed of carbon and hydrogen atoms with an attached OH group.
Recall that the OH group is known as a hydroxyl group, which is characteristic of certain functional groups in organic chemistry.
Understand that carboxylic acids contain a carbonyl group (C=O) and an OH group attached to the same carbon, forming a -COOH group, which is different from just an OH group.
Recognize that aldehydes and ketones both contain a carbonyl group (C=O) but do not have an OH group attached; aldehydes have the carbonyl at the end of the carbon chain, ketones have it within the chain.
Conclude that the functional group characterized by a molecule mostly of carbon and hydrogen with an OH group attached is an alcohol.