1.1. A student processed a sample of food into an aqueous solution and tested it with a test solution. The test solution changed from blue to violet.

Name the solution used in this test.

1.2. State the food group that the experiment in part (a) showed a positive result for.

1.3. A sample of butter was shaken with ethanol, followed by an equal volume of cold water.

Predict the appearance of the mixture after the addition of water.

1.4. A sample of freshly-squeezed orange juice was mixed with DCPIP solution.

Predict the result of this food test, and explain your prediction.