. How are the following obtained


(a) How are the following obtained

(i) Benzoic acid from ethylbenzene

(ii) Benzaldehyde from toluene

(b) Complete each of the following reactions by giving the missing reactant, reagent or product

Anhydrous

Anhydrous

(a) How will you bring about the following conversions

(i) Ethanol to 3-hydroxybutanal

(ii) Benzaldehyde to benzophenone

(b) An organic compound A contains 69.77% carbon, 11.63% hydrogen and the rest oxygen. The molecular mass of the compound is 86. It does not react with Tollen’s reagent but forms an addition compound with sodium hydrogen sulphite and gives a positive iodoform test. On vigorous oxidation it gives a mixture of ethanoic and propanoic acids. Derive the structure of compound A

Best Answer

Benzoic acid from ethylbenzene

Benzaldehyde from toluene

     Ethanol to 3-hydroxybutanal

As the compound A forms addition compound with NaHSO3 therefore it must be either an aldehyde or ketone.

As it does not reduce Tollens reagent and give positive iodoform test therefore it must be a methyl ketone

As on oxidation the compound A gives a mixture of ethanoic acid and propanoic acid, therefore compound A is

oxygen

 

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