1.

The alpha-hydrogen atom attached to the carbonyl group is acidic in nature because the carbanion which is left gets resonance stabilished. As a result, these compounds take part in the aldol condensation reactions. The carbanion acts as a nucleophile in these reactions. The compounds in which alpha-hydrogen is not acidic take part in the Cannizzaro's reaction. In this reaction, one molecule of the carbonyl compound under consideration is reduced to primary alcohol while the other is oxidised simutaneously to the carboxylic acid. An organic compound 'A' of the molecular formula C_(5)H_(10)Cl_(2) is hydrolysed to compound 'B' C_(5)H_(10)O which gives an oxime with hydroylamine and yellow precipitate with a mixture of iodine and sodium hydroxide. The compound 'A' should be :

Answer»

`CH_(3)CH_(2)C Cl_(2)CH_(2)CH_(3)`
`CH_(3)CH_(2)CH_(2)C Cl_(2)CH_(3)`
`CH_(3)CH_(2)CH_(2)CH_(2)CHCl_(2)`
`CH_(3)CH_(2)CH_(2)CHClCH_(2)CL`.

SOLUTION :


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