Question

Activity....... test for starch in leaves​

Answer 1

Answer:

the purpose of boiling leaves in alcohol is that it dissolves greenish part that is chlorophyll then wash theleaf in cold. water. and place it in a watch glass. now pour some drops of iodine solution over it observation theleaf turns blue conclusion this shows that starch is present in the leaf.

Answer 2

Answer:

activity

Explanation:

Aim:

test starch in leaves

Requirements:

water, boiling tester, boiling tube, ethyl alcohol, iodine reagent

Procedure:

To test leaves for the presence of starch,the leaf is boiled in water and then the boiled leaf is placed in a boiling tube containing 90% ethanol (ethyl alcohol). The ethanol boils and the green colouring (chlorophyll) is removed from the leaf. The iodine reagent is then added, which causes the green areas on the leaf, where starch is supposedly present, to turn to a blue-black colour.

Observation:

This indicates the presence of starch in the leaf.

i hope this was helpful.

**************