An organic compound (A) adds `Br_(2)` to give `C_(5)H_(8)Br_(2) O.` It does not react with Tollens' reagent but entere into reaction with phenyl hydrazine. Ozonolysis of (A) gives an acetaldehyde and `C_(3)H_(4)O_(2)` which readily loses CO to form acetaldheyde. What it (A)?

Explanation

An organic compound react with `Br_(2)` and add one molecules and of bromine. Thus, it consists one double bond. The compound is a ketone as it react with phenylhydrazne but does not react with Tollens' reagent. The ozonolysis of (A) gives acetaldehyde and `C_(3)H_(4)O_(2)` Thus, the compound (A) is,
`CH_(3)CH_(4)=underset((A))(CHCOCH_(3))overset("Ozonolysis")rarrCH_(3)CHO+CH_(3)CHCHOunderset((-CO))rarrCH_(3)CHO`
`alpha` ketoaldehyde loss CO readily to form aldehydes.