Tiwari’s test–the iodine tincture test–is a legit trick that turns paneer blue-black in the presence of starch—a telltale ...

Dissolve 40 drops of iodine tincture in 10 litres of water. Pour it under the roots of cucumbers, tomatoes, cabbage or peppers. Water them with this mixture every three - four weeks .

Iodine in water is yellow, and when added to the food color the result is ... To Conduct Demonstration: Pour solution of blue food color into one test tube to a depth of 2". To one of the tubes ...