Question
Many organic compounds, including alcohols, carbonyl compounds, carboxylic acids and esters, contain oxygen.
(a) The table below lists some oxygen-containing organic compounds and some common laboratory reagents.
(i) Complete the table as fully as you can.
If you think no reaction occurs, write ‘no reaction’ in the box for the structural formula(e).
(ii) During some of the reactions in (i) a colour change occurs.
Complete the table below for any such reactions, stating the letter of the reaction and what the colour change is.
(b) Some oxygen-containing compounds react with 2,4-dinitrophenylhydrazine.
(i) Draw the structural formula of the organic compound formed when HOCH$_2$CH$_2$CHO reacts with 2,4-dinitrophenylhydrazine reagent.
(ii) Suggest the colour of the organic product.[2] [Total: 12]
Answer/Explanation
Ans:
(a) (i)
(b) (i)
(ii) red or orange