What is the chemical test to confirm the presence of starch?

Answer 1

1. Place a small amount of starch powder in a test tube filled with cold water

2. Boil it to make a clear solution

3. Once the solution has cooled off, you should put 3 or 4 drops of iodine solution in it.

4. The solution should turn dark blue.

Answer 2

1. Add some starch powder into a test tube containing cool water

2. Give it a shake

3. Boil the solution to make a clear solution

4. Once it's cooled down, add 3-4 drops of iodine

5. The solution should turn blue, proving that starch is present in the solution

If Iodine is added to starch, the solution turns a blue black colour.

Answer 3

You add iodine solution to an unknown solution if the solution goes from a red brown colour to a blue black colour then starch is present.

Answer 4

We can do the following by adding 2-4 drops of iodine solution in it. If the color changes from white (color of starch) to Blue-black color it is confirmed that starch is present.

Answer 5

The iodine test is used to test for the presence of starch. In the presence of an iodine solution, starch turns anywhere from blue to purple to black.

Answer 6

an iodine test is used