Which of the following contains a carbonyl group as a common feature of hydrocarbon derivatives?

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Multiple Choice

Which of the following contains a carbonyl group as a common feature of hydrocarbon derivatives?

Explanation:
A carbonyl group is a carbon atom double-bonded to oxygen (C=O), a defining feature of many hydrocarbon derivatives such as aldehydes and ketones. Acetaldehyde has the structure CH3-CHO, where the carbonyl carbon is double-bonded to oxygen and bonded to a hydrogen, which is exactly the aldehyde carbonyl arrangement. The other molecules are different: methane and propane are saturated hydrocarbons (alkanes) with only single bonds and no C=O; ethene contains a C=C double bond between carbons but does not have a carbonyl C=O bond. So, acetaldehyde is the one that contains a carbonyl group.

A carbonyl group is a carbon atom double-bonded to oxygen (C=O), a defining feature of many hydrocarbon derivatives such as aldehydes and ketones. Acetaldehyde has the structure CH3-CHO, where the carbonyl carbon is double-bonded to oxygen and bonded to a hydrogen, which is exactly the aldehyde carbonyl arrangement. The other molecules are different: methane and propane are saturated hydrocarbons (alkanes) with only single bonds and no C=O; ethene contains a C=C double bond between carbons but does not have a carbonyl C=O bond. So, acetaldehyde is the one that contains a carbonyl group.

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