Question

Name two properties due to which a change becomes noticeable.​

Answer 1

Answer:

The following are indicators of chemical changes:

Change in Temperature.

Change in Color.

Noticeable Odor (after reaction has begun)

Formation of a Precipitate.

Formation of Bubbles.

Answer 2

Change in Color. Noticeable Odor (after reaction has begun) Formation of a Precipitate. Formation of Bubbles.

Solid → Liquid: Melting

Liquid → Solid: Freezing

Gas → Liquid: Condensation

Liquid → Gas: Vaporization

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