Question

Classify the following changes as physical and chemical changes:

1. Filling a hot balloon with hot water
2. Mixing of baking soda and vinegar which causes formation of bubbles
3. A glass tumbler falls from the table and shatters on the floor into pieces
4. Ripening of an apple

Answer 1

Changes can be classified as two, i.e.,

1. Physical changes: Changes which involve only physical properties such as colour, state, etc keeping the chemical identity the same and no new substance formed during a physical change
2. Chemical changes: Changes which involve chemical properties such as bonding making the substance change to new substance.

So, we can classify changes: filling hot balloon with hot water, A glass tumbler falls from the table and shattering on the floor into pieces as physical changes.

Mixing of baking soda and vinegar which causes formation of bubbles, Ripening of an apple as chemical changes

Physical changes	Chemical changes
Filling hot balloon with hot water	3. Mixing of baking soda and vinegar which causes the formation of bubbles
3. A glass tumbler falls from the table and shatters on the floor into pieces	4. Ripening of an apple