Question

27. Which chemical is needed for the
starch test?

(a) Glycerine
a
(b) Chlorine
b
(e) lodine
(d) All of these
(​

Answer 1

Answer:

e. Iodine....is the correct answer

Answer 2

iodine solution

This is a physical test. A chemical test for starch is to add iodine solution (yellow/brown) and look for a colour change. In the presence of starch, iodine turns a blue/black colour. It is possible to distinguish starch from glucose (and other carbohydrates) using this iodine solution test.