Question

What experiment should you perform to understand action of saliva on flour? Explain it’s procedure and opparatus that you followed.

Answer 1

HEY MATE UR ANSWER IS

Experiment to understand action of saliva on flour.

SO UR AIM IS

Aim : To demonstrate the action of saliva on flour.

WE NEED SOME APPARATUS FOR PERFORM ARE EXPERIMENT

Apparatus :  flour, watch glass, dilute tincture iodine, Test tubes (2), saliva

SO NOW WE HAVE EVERYTHING TO START ARE EXPERIMENT SO LET START  

Procedure: #Take a test tube half-filled with water and add a pinch of flour to it.

#Shake the test tube well till the flour gets mixed.

#Take a few drops of this mixture in a watch glass and test for the presence of starch by putting a drop of dilute tincture iodine in it.

#A blue-black colour confirms the presence of starch.

#Now again dissolve a pinch of flour into half-filled water in a test tube.

#Now divide the mixture into two equal halves by transferring it to another test tube

[NOTE = that both the test tubes have the same amount of solution.]

#Add a teaspoon of saliva to one of the test tube and mark it

[NOTE = Do not add anything in the other test tube.]

#After sometime (45 minutes) add a drop of dilute tincture iodine solution to test tubes containing the solution.

NOW ARE EXPERMENT IS COMPLETED BUT WE ALSO HAVE TO OBSERVE IT

SO OUR

Observation :  

#The solution of the test tube to which saliva is added shows colour change as starch is converted to sugar.

#There is no colour change in the other test tube to which saliva is not added. Inference

NOW WE ALSO HAVE TO WRITE RESULT OTHERWISE ARE EXPERIMENT IS INCOMPLETE SO

result:

The enzyme amylase in the saliva breaks down the starch molecules into smaller subunits usually into sugars.

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HOPE THIS HELP U

THANKS

Answer 2

A. Experiment to understand action of saliva on flour.

Aim : To demonstrate the action of saliva on flour.

Apparatus : Test tubes (2), flour, watch glass, dilute tincture iodine, saliva (1 teaspoonful)

Procedure:

Take a test tube half-filled with water and add a pinch of flour to it.

Shake the test tube well till the flour gets mixed.

Take a few drops of this mixture in a watch glass and test for the presence of starch by putting a drop of dilute tincture iodine in it.

A blue-black colour confirms the presence of starch.

Now again dissolve a pinch of flour into half-filled water in a test tube.

Now divide the mixture into two equal halves by transferring it to another test tube.