Which of the following compounds does not giv | vedclass

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(B) Tollen's test is given by aldehydes and $\alpha$-hydroxy ketones. $A$. Tetrahydropyran$-2-$ol is a hemiacetal,which exists in equilibrium with $5-

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Acetophenone

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(B) Tollen's test is given by aldehydes and $\alpha$-hydroxy ketones. $A$. Tetrahydropyran$-2-$ol is a hemiacetal,which exists in equilibrium with $5-$hydroxypentanal (an aldehyde),so it gives a positive Tollen's test. $B$. Acetophenone is a ketone and does not contain an $\alpha$-hydroxy group,so it does not give Tollen's test. $C$. Benzaldehyde is an aldehyde,so it gives a positive Tollen's test. $D$. Benzoin $(Ph-CO-CH(OH)-Ph)$ is an $\alpha$-hydroxy ketone,so it gives a positive Tollen's test. Therefore,the correct answer is $B$.

Which of the following compounds does not give Tollen's test?

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