Question

To test a leaf for starch, the leaf is boiled in water to (i)__________. It is then

boiled in Methylated spirit to (ii)__________. The leaf is dipped in warm water

to soften it. It is placed in a petri dish, and (iii)__________ solution is added.

The region of the leaf which contains starch, turns (iv)__________ and the

region which does not contain starch, turns (v)__________.​

Answer 1

Answer:

1- de starch the leaf

2 remove chlorophyll

3- I iodine

4 Bluish black colour

5 remains same

Answer 2

Answer:

To test the leaf for starch, the leaf is boiled in water to (i) kill the cells. It is next boiled in methylated spirit to (ii) remove chlorophyll. The leaf is placed in warm water to soften it. It is then placed in a dish and (iii) iodine solution in added. the region of the leaf which contains starch turns blue (iv) blue-black and the region which does not contains starch turns (v) brown.