Question

while performing an activity took some boiled rice in one test tube and in another test tube some chewed boiled rice mixed with saliva and did starch test. Which solution will she take to test it?

a. Sulphuric Acids

b.Hydrochloric Acid

c.Sodium Hydroxide

d. Iodine Solution
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Answer 1

Answer:

iodine solution sulphuric acid hydrochloric acid sodium hydroxide

Answer 2

Answer:

it is Iodine solution

Explanation:

In test-tube A, the boiled rice contains starch. When we add 1-2 drops of iodine, the combination turns in the shade of blue-black. This indicates the presence of starch in the test tube A.

In test-tube B, the starch of rice converts into sugar on digestion. Thus, the colour of iodine will not change.