Question

Write the procedure to be followed in the starch test​

Answer 1

Answer:

Step 1: A fresh leaf is taken.

Step 2: The leaf is boiled in water for few minutes to soften the cells in the leaf.

Step 3: Now, dip this leaf in iodine solution.

Step 4: The color of the leaf will changes into blue black color when iodine is added to it which shows the presence of starch in it.

Explanation:

Answer 2

Answer:take the leaf carefully from test tube by using a brush. spread the leaf in a petridish and add a few drops of tincture iodine(or) betadine solution with the help of a dropper on it again observe the leaf the presence of starch will be indicated by a blue-black colour. so the presence of the starch can be tested iodin solution which turns starch bluish-black colour