Question

choose the option below that is a characteristic of ketones. select the correct answer below: they contain a carbonyl group that exhibits sp hybridization around the carbon atom. they contain a carbonyl group with a nonpolar carbon - oxygen bond. the functional group of this type of compound must always be on the end of a carbon chain. the functional group of this type of compound must always be in the middle of a carbon chain.

Explanation:

Step1: Analyze carbon hybridization

Ketones have a carbonyl group ($\ce{C=O}$). The carbon in the carbonyl group of ketones has $sp^{2}$ hybridization (not $sp$), so the option about $sp$ hybridization is wrong.

Step2: Analyze carbon - oxygen bond polarity

The carbon - oxygen bond in the carbonyl group ($\ce{C=O}$) is polar (because oxygen is more electronegative than carbon), so the option with non - polar carbon - oxygen bond is wrong.

Step3: Analyze position of carbonyl group

In ketones, the carbonyl group ($\ce{C=O}$) is always in the middle of a carbon chain. Aldehydes have the carbonyl group at the end of a carbon chain. So the option with the carbonyl group at the end is wrong and the option with the carbonyl group in the middle is correct.

Answer:

The functional group of this type of compound must always be in the middle of a carbon chain.