Question

Give five characteristics of chemical changes

Answer 1

The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change. Challenge: food cooking, rust formation, tarnish forming on doorknobs, fuel burning for heat, tarnished penny.

Answer 2

Answer:

There are five signs of a chemical change:

1. Color Change

2. Production of an odor

3. Change of Temperature

4. Evolution of a gas (formation of bubbles)

5. Precipitate (formation of a solid)

The characteristics of chemical change are-

1.Shape can change the substance .

2.New substance is formed.

3. It is not reversible change.

4. It is a permanent change.

5.The properties of substance are not retain.

Example- Curd from milk.