This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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You're on a roll — let's identify these organic compounds. First, let's identify the functional groups and molecular formulas for each compound: A: CH_3COCH_2CH_3 is Butanone (a ketone). Molecular formula: C_4H_8O. B: CH_3CH_2CH_2COOH is Butanoic acid (a carboxylic acid). Molecular formula: C_4H_8O_2. C: CH_3CH_2CO_2CH_3 is Methyl propanoate (an ester). Molecular formula: C_4H_8O_2. D: CH_3CH_2CH_2CHO is Butanal (an aldehyde). Molecular formula: C_4H_8O. E: CH_3CH_2OCH_2CH_3 is Diethyl ether (an ether). Molecular formula: C_4H_10O. Now, let's answer each part: (i) Is a carboxylic acid derivative? A carboxylic acid derivative is a compound that can be formed from a carboxylic acid. Esters are common carboxylic acid derivatives. Compound C (CH_3CH_2CO_2CH_3) is an ester. C (ii) Produces a red precipitate of copper (I) oxide when boiled with Fehling's solution? Fehling's solution is used to test for aldehydes. Aldehydes reduce the Cu^2+ ions in Fehling's solution to Cu_2O, which is a red precipitate. Ketones do not react. Compound D (CH_3CH_2CH_2CHO) is an aldehyde. D (iii) Is isomeric with compound A? Isomers have the same molecular formula but different structural formulas. Compound A has the molecular formula C_4H_8O. Compound D (CH_3CH_2CH_2CHO) also has the molecular formula C_4H_8O. D (iv) Could be reduced to a secondary alcohol? The reduction of a ketone yields a secondary alcohol. The reduction of an aldehyde yields a primary alcohol. Compound A (CH_3COCH_2CH_3) is a ketone. Its reduction would yield butan-2-ol, which is a secondary alcohol. A (v) Gives a yellow crystalline precipitate when reacted with iodine in basic solution? This describes the iodoform test. A positive iodoform test (yellow precipitate of iodoform, CHI_3) is given by compounds containing a methyl ketone group (CH_3CO-) or a methyl carbinol group (CH_3CH(OH)-, which can be oxidized to a methyl ketone). Compound A (CH_3COCH_2CH_3) contains a methyl ketone group (CH_3CO-). A What's next?