In baking biscuits and the other bread the baking powder reacts to release carbon dioxide bubbles the carbon dioxide bubbles cause the dough to rise physical or chemical change?

The reaction of baking powder in biscuit and bread dough is a chemical change. When baking powder is mixed with moisture and heat, it undergoes a chemical reaction that produces carbon dioxide gas. This gas forms bubbles in the dough, causing it to rise. Unlike physical changes, which do not alter the chemical composition of a substance, this reaction fundamentally transforms the ingredients involved.