Question

Which solution is used to test the starch??

a) Chlorine solution
b) Iodine solution
c) both of these
d) none of these ​

Answer 1

Answer:

c) both of these

Explanation:

Presence of starch in leaves can be tested by iodine test. Iodine turns starch solution into blue-black colour. The leaf becomes blue-black which proves the presence of starch in it. The starch is a carbohydrate.

Chlorine turns moist starch iodide paper blue-black because the iodide ions on the paper are oxidised to iodine and the starch react to it to give blue black compound.