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.
There is actually no starch in couscous.
About 70% of the rice is starch.
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.
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 disease is caused by deficiency of the starch in your diet. Starch fallow you in your diet, specially vegetarian diet.
When iodine reacts with starch, the solution will turn a brownish colour.