Question

5.3 Test tube A consists of water and one teaspoon of boiled
rice. Test tube B consists of water and one teaspoon of
boiled rice that has been chewed for 5 minutes. Two drops
of iodine solution are added to both the test tubes. Test
tube A changes to a blue colour, whereas test tube B does
not, as shown in Fig. 23. Can you think of a reason why?
Explain your answer.
(Writing tip: Start your answer with 'I think that test tube B
does not change colour because ...)​

Answer 1

Answer:

hey mate

Explanation:

i think test tube b not changes its colour because chewed rice has been mixed with saliva in the mouth that make it unable to change its colour

Answer 2

Answer:

I THINK starch in the boiled rice would have been broken into sugar while chewing