is chemically produced

baking soda

, and the ingredient is

sodium bicarbonate

Flour is generally a flour ground from grains, such as

wheat flour

,

corn flour

, and

soybean flour

. But the colloquialism mostly refers to wheat flour

Wheat flour is the flour ground from wheat. It is used for steaming steamed buns,

cookies

, rolling out noodles, etc.

Raw flour is generally starch, processed from sweet potatoes, corn, wheat, etc.