Question

2) A student makes a list of some activities he observes one day.
1. baking a cake in an oven
2. cutting an apple pie into slices
3. crushing the can after drinking a soda
4. carving a wooden log to make a stand
Which activity can the student classify as a chemical change?
(a) Activity 1, as the properties of the substances in the mixture change
(b) Activity 2, as the physical state of the apple pie changes when cut
(c) Activity 3, as the shape of the can changes.
(4) Activity 4 as the shape and size of the wooden log changes.​

Answer 1

Explanation:

(c) Activity 3, as the shape of the can changes.

Hope its help...

Answer 2

Baking a cake in an oven can be classified as a chemical change.

What is a chemical change?

• A chemical change occurs when something new is created. The beginning ingredients transform into different substances or substances.
• The chemical composition of the resultant compound is different.

Why baking cake is a chemical change?

• While baking cake in the oven the baking soda undergoes a chemical reaction, which leads to chemical transformation. The heat aids the production of tiny gas bubbles in the baking soda, resulting in a light and fluffy cake.
• The batter rises because of the stored carbon dioxide. So, new compounds are formed and the reaction could not be reversed, it is termed an irreversible chemical change.

Hence, we can conclude that baking cake in the oven is a chemical change as new substances are formed. While the other options are physical changes as no new substance is formed.