Question

Attempt either (a) or (b): **(a)** A neutral organic compound 'A' (molecular formula $C_2H_6O$) reacts with acidified $K_2Cr_2O_7$ and on oxidation gives an acidic compound 'B'. Compound 'A' reacts with compound 'B' on warming, in the presence of concentrated $H_2SO_4$ to give a sweet smelling substance 'C'. What are A, B and C? Also write their structures. **OR** **(b)** Give reasons for the following: (i) Unsaturated hydrocarbons show addition reactions. (ii) Detergents are better cleansing ag

Accepted Answer

0. **Part (a):** - **A:** Ethanol ($CH_3CH_2OH$) - **B:** Ethanoic acid ($CH_3COOH$) - **C:** Ethyl ethanoate / Ester ($CH_3COOCH_2CH_3$) - Reactions: $$CH_3CH_2OH \xrightarrow{	ext{Acidified } K_2Cr_2O_7} CH_3COOH$$ $$CH_3CH_2OH + CH_3COOH \xrightarrow{	ext{Conc. } H_2SO_4} CH_3COOCH_2CH_3 + H_2O$$

Ethanol Oxidation and Esterification

Explanation

Practise this under board exam conditions