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Question

A neutral organic compound X of molecular formula C2H6O on oxidation with acidified potassium dichromate gives an acidic compound Y. Compound X reacts with Y on warming in the presence of conc. H2SO4 to give a sweet-smelling substance Z. What are X, Y and Z?


Solution

The neutral organic compound 'X' having the molecular formula C2H5OH  is ethanol (alcohol with functional group -OH). 

When ethanol undergoes oxidation reaction (controlled combustion) with acidified potassium dichromate, it gets oxidised to form an acidic compound, Y, called ethanoic acid (CH3COOH).

CH3CH2OH+2[O]KMnO4−−−−CH3COOH+H2O.

Ethanol reacts with ethanoic acid in the presence of concentrated sulphuric acid to release a sweet smelling ester, Z, called ethyl ethanoate (CH3COOCH2CH3).

 CH3COOH+CH3CH2OHConc.H2SO4−−−−−−−CH3COOC2H5+H2O


Chemistry
Science for Tenth Class - Part II - Chemistry
Standard X

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