Question

question 8
which of the following is not a chemical reaction?
synthesizing a new compound.
cutting a piece of paper.
baking a cake.
burning a piece of wood.

Explanation:

To determine which is not a chemical reaction, we analyze each option:

• Synthesizing a new compound: Involves forming new substances (chemical reaction).
• Cutting a piece of paper: Only changes the size/shape of paper, no new substance (physical change, not a chemical reaction).
• Baking a cake: Ingredients undergo reactions (like protein denaturation, Maillard reaction) to form new substances (chemical reaction).
• Burning wood: Combustion forms new substances (CO₂, ash, etc., chemical reaction).

Answer:

B. Cutting a piece of paper