question_answer

                An important reaction of acetone is auto condensation in presence of concentrated sulphuric acid to give the aromatic compound ......

A)  mesitylene       

B)  mesityl oxide

C)  trioxan                                

D)  phorone

Correct Answer: A

Solution :

Three moles of acetone condense in presence of cone. \[{{H}_{2}}S{{O}_{4}}\] to give mesitylene. \[\underset{acetone}{\mathop{3C{{H}_{3}}COC{{H}_{3}}}}\,\xrightarrow[-3{{H}_{2}}O]{conc.\,\,{{H}_{2}}S{{O}_{4}}}\]