The diagram illustrates three reactions of ethanal. In every case, ethanal is used in excess. Ethanal $\text{CH}_3\text{CHO}$ reacts: - with acidified $\text{K}_2\text{Cr}_2\text{O}_7$ (heat) to produce solution 1, - with alkaline $\text{I}_2\text{(aq)}$ (heat) to produce solid 2, - with Fehling’s solution (boil) to produce solid 3. After each of the three reactions, observations are recorded. What colours are observed for solution 1 and for solids 2 and 3?
- Asolution 1: green; solid 2: yellow; solid 3: silver mirror
- Bsolution 1: green; solid 2: yellow; solid 3: red
- Csolution 1: orange; solid 2: red; solid 3: silver mirror
- Dsolution 1: orange; solid 2: red; solid 3: red