Question

In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. The carbon dioxide bubbles cause the dough to rise. Physical or Chemical change? Give a reason why.

Answer 1

Answer:

Explanation:

In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles.  The carbon dioxide bubbles cause the dough to rise.

CHEMICAL  

A new gas is produced which makes the biscuits rise.  

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Answer 2

The rise of dough due to the formation of Carbon-di-oxide bubbles is a chemical change.

• While adding baking powder to the flour to make biscuits and bread, the baking powder reacts with the flour and water to release Carbon-di-oxide gas.
• Thus, a chemical reaction takes place. This is because, baking powder is chemically called a mixture of Sodium-bicarbonate, and cream of cornstarch and tartar.
• Adding up baking powder enhances the texture of the bread and biscuits and makes them soft and delicious.
• When this chemical substance on undergoing a chemical reaction released Carbon-di-oxide gas bubbles. This results in the rise of the dough.
• As a chemical reaction takes place in this process, a chemical change is involved.

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