Oranges, like almost every fruit, have an abundance of natural sugars (glucose, sucrose, fructose) in the form of mono or di-saccharides. It probably do not contain detectable amount of starch.
No, it does not.
no starch is absent in oranges
There is no significant amount of starch in an orange.
the iodine stayed orange because the starch wasn't present
light orange/ yellow
It turns it orange.
no but a potato is. if you want to try figuring it out yourself, put some iodine on the orange.
Starch solution.
Use Iodine as an indicator. Just add it to your sample and the orange-brown colour will turn blue-black in the presence of starch.
Because baking soda is NaHCO3 and starch is (C6H10O5). Getting starch in packs of baking soda would be like getting mincemeat in your orange juice. It's not what you're buying.
When iodine reacts with starch, the solution will turn a brownish colour.
Starch is polymer composed of many glucose molecules connected together by glycolytic bonds, oranges contain many sugars, including glucose, fructose, and sucrose, so it is not thoroughly composed of glucose molecules, and therefore will not form starch.
To test for starch you could use the Starch Test:Starch Test: Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour. A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow. Starch amylopectin does not give the color, nor does cellulose, nor do disaccharides such as sucrose in sugar.if starch is present it will turn blue/purple
Iodine-KI reagent. Add to the substance being tested directly. Result: If positive, Turns Blue/Black If negative, (absence of starch) Solution remains orange/yellow.