2.7 test for starch and glucose

1. White glucose powder is added to water.
2. Benedicts solution (blue) is then added to the solution.
3. The testube is then into a water bath which should be round about 60-70 centigrades.
4. After 2-3 minutes we would see a colour change from blue to an orange.
5. In weak solution of glucose the blur colour would change to green.

1. White starch powder is added into a dimple tray.
2. We would then add iodine solution (pottasium iodide).
3. Iodine solution is brown.
4. The colour change witnessed would be from brown to black.