If you mean to test for starch then Iodine
For thickening soups, stews, and gravies, you can use flour instead of cornstarch.
Cream is not a good replacement for cornstarch. Instead use 2 tablespoons of flour for 1 tablespoon of cornstarch. Or you could use 4 teaspoons of quick cooking tapioca for 1 tablespoon of cornstarch.
If your recipe calls for cornstarch but you do not have any on hand, you can easily use flour. If the recipe calls for 1 tbsp. of cornstarch, use 2 tbsp. of all-purpose flour.
no because cornstarch is sweet and flour is sour. I believe you use about half the amount of cornstarch when subsituting for flour.
IF YOU MEAN FOR COOKING USE FLOUR.
to thicken food use cornflour or cornstarch
you can use cornstarch
Iodine reacts with starch, but not with talc, to produce a blue color.
Yes but it will make it thicker
2 Tbsp all-purpose flour = 1 Tbsp cornstarch Whatever amount of cornstarch your recipe calls for, just double that measurement and use flour instead.
You can test for starch in general using the chemical iodine test. If starch is present, a solution of iodine (I2) turns blue-black.
The only way to separate cornstarch and water is my filtration so you would have to use filter paper or something similar.