Funny Sms Funny Puzzle Funny Science Trick Funny Ringtone Funny Video Funny Urdu Fashion

Materials

soup bowl
cup (250 ml)
tincture of iodine
eyedropper
lemon
notebook paper
art brush

Procedure

• Pour ½ cup (125 ml) water into a soup bowl.
• Add 10 drops of tincture of iodine to the water and stir.
• Squeeze the juice of the lemon into the cup.
• Cut a section from the notebook paper. The paper must fit inside the bowl.
• Dip the art brush into the lemon juice and write a message on the piece of paper.
• Allow the juice to dry on the paper.
• Submerse the paper in the iodine solution in the bowl.

Results

The paper turns a blue-purple except where the message was written. The words are outlined by the dark background.

Why?

The starch in the paper combines with the iodine to form iodine-starch molecules. These molecules are blue-purple in color. Vitamin C combines with iodine to form a colorless molecule. The area covered
with lemon juice remains unchanged because the paper is coated with vitamin C from the lemon.