Wholewheat flour
yes. They are the same thing. Plain flour is an Australian term where all-purpose is the American.
Plain flour most likely is AP flour and I say yes at any rate.
You can but you need to add baking powder and salt to it.
It is best to use self-raising flour if the recipe asks for it, as it is not the same as plain flour, but you can substitute plain flour for self-raising flour provided you add raising agents like baking powder and bicarbonate of soda yourself to the flour.
One can make other types of flour using all purpose flour, but not the reverse. The other flours have additional things added, foe example, Bread flour has wheat gluten and Self rising flour has salt and baking powders.
No. Rice flour is made from rice. Plain flour is refined wheat flour. Self rising flour is refined wheat flour with baking powder and salt already in it. Wheat flour has gluten, rice flour does not and cannot be used to substitute for wheat flour.
You can substitute twice the amount of flour for the amount of cornstarch called for in most recipes. So you would use 6 tablespoons of flour, but use plain flour and not self rising.
With most flours if it doesn't specifically say "cake flour" on the package, then it is not the same as cake flour. But you can substitute plain (not self rising) flour for cake flour. For each cup of cake flour called for in the recipe, use one cup minus two tablespoons plain flour, and sift it at least twice (after measuring). White Lily says you can substitute their flour for "cake flour" without making any changes, and it does not need to be sifted. For more information on White Lily Flour see the related link below.
Gram flour is made from chickpeas, and can be used in place of corn or wheat flour for thickening soups, sauces and gravies. Gram flour is gluten free, and provides a nutty flavor to foods. You can substitute it for other flours in equal amounts.
yes
That is 2.9 cups of flour