Take 1 ml of starch solution in two test tubes A and B. Add 1ml saliva to the test tube A and leave both test tubes undisturbed for 20 to 30 minutes now add a few drops of delute iodine solution to the test tubes. In which test tube you will observe a colour change. what does this tell about the action of the saliva on the starch



9in test tube A we will observe change in color. this is due to presence of starch.