Saturated open-chain carbonyl compounds (aldehydes and ketones) of formula C5H10O are considered. How many of them give a positive Tollens' test or a positive iodoform test (or both)? Structural isomers only.

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Saturated open-chain carbonyl compounds (aldehydes and ketones) of formula $C X_{5} H X_{10} O$ are considered. How many of them give a positive Tollens' test or a positive iodoform test (or both)? Structural isomers only.

Answer: A

There are 4 aldehydes (all Tollens-positive) and 3 ketones: pentan-2-one and 3-methylbutan-2-one are methyl ketones (iodoform-positive), pentan-3-one is not. No aldehyde C5 isomer contains CH3CO. Hence 4 + 2 = 6 compounds qualify.

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Saturated open-chain carbonyl compounds (aldehydes and ketones) of formula CX5​HX10​O are considered. How many of them give a positive Tollens' test or a positive iodoform test (or both)? Structural isomers only.

Answer: A

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Saturated open-chain carbonyl compounds (aldehydes and ketones) of formula $C X_{5} H X_{10} O$ are considered. How many of them give a positive Tollens' test or a positive iodoform test (or both)? Structural isomers only.