Question

The colour of iodine solution is a. Colourless b.pinkcolour c.Blue_black d.Yellow_brown

Answer 1

Initially, the iodine solution is yellowish brown. However, after the solution is added to a starch product, it would either be blue-black or purple. So I reckon the answer to be 'D'. 

Answer 2

yellow_brown is the colour of iodine solution