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Shiju collected his saliva and mixed it with liquid A in the test tube. In another test tube he took only liquid A. After 10 minutes, he added a few drops of iodine solution in the mixture in the first test tube. It did not show any colour but when he treated the other test tube with iodine, a blue black colour appeared. What is the aim of this activity? What is liquid A? Why did the first test tube not show any colour change with iodine while the second one did?

liquid A contains starch solution. The aim of this activity is to verify that the starch is digested by saliva. The first test tube dosent shows any change in colour because it contains saliva and starch and the starch is dissolved completely in the saliva. We know that iodine when reacts with starch, the solution turns blue-black in colour so there is no starch left in test tube A and hence there is no change in colour. Unlikely in the test tube B there is no saliva and only starch-iodine solution is present in it so there is no change in colour in second test tube.

Thankyou, hope you would like the answer.

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The aim of the activity is to show that i) saliva digests starch

the solution A is starch solution
Iodine is used to test for the presence of starch...
the first test tube didn't show any change in colour because the saliva has digested the starch and hence to starch is left
but the second one still has starch in it hence the colour turns blue black
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what is Lewis A
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In this why enzyme is responsible for such a result
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liquid A contains a starch solution. This activity aims to verify that the starch is digested by saliva. The first test-tube doesn't show any change in colour because it contains saliva and starch and the starch is dissolved completely in the saliva. We know that iodine when reacts with starch, the solution turns blue-black so there is no starch left in test tube A and hence there is no change in colour. Unlikely in the test tube B there is no saliva and the only starch-iodine solution is present in it so there is no change in colour in the second test tube.

Thank you, hope you would like the answer.

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hi my name is idk
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SOLUTION A IS THE STARCH SOLUTION.
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Parvati collected his life and mix it with the liquid in the test tube another test tube he took only liquid after 10 minutes we added a few drops of iodine solution in the mixture in the first test tube not show any colour but when she treated The Other test tube other test tube with iodine dablu black colour appeared now answer what is the aim of this activity what is liquid a why did the first test you not show any colour change with diode and while the second wanted which enzyme is
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