Yes. All-purpose flour and unbleached flour are usually the same thing. Just be sure that the package doesn't say something like 'self rising', 'bread flour', or 'cake flour' - those ARE NOT all-purpose flour.
Most unbleached flour is all-purpose flour that has not been treated with chemicals to increase its whiteness. So bleached all-purpose flour can be substituted for unbleached all purpose flour if that type of processing is not a concern. Whether or not cake flour should be used depends on what is being baked. Cake flour is not recommended when baking bread.
Yes you can. Unbleached flour is usually the same as all-purpose flour.
yes
all purpose flour has bleach in it, therefore when you eat anything made with all purpose flour you are eating bleach.
Yes, unbleached flour can be used in just about anything that calls for flour.
Self-rising Flour
yes enriched flour can be substituted for all purpose flour in a cake
It most likely already is. All purpose can be bleached or unbleached, same flour, one is just whiter than the other.
There are cake flours, otherwise all-purpose and unbleached flour is great to use.
In general, yes.
All-purpose flour can be used as a substitute for cornstarch.
yes. They are the same thing. Plain flour is an Australian term where all-purpose is the American.
yes
yes