Iodine test is performed to detect the presence of:

Which of the following test tubes will give a positive test for starch when tested with iodine solution?

(i)              (ii)                  (iii)                         (iv) 

Cooked rice             Baking soda             Sugar powder                    Cooked Potato

Select the correct sequence of testing starch in the potato sample:

(i) Peel off the skin of potato.

(ii) Cut a slice of potato.

(iii) Place the slice of potato on a slide.

(iv) Add a few drops of iodine solution.