Question

write any 3 points of chemical change​

Answer 1

When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.

Chemical change both physical and chemical properties of the substance including its composition

During a chemical reaction, absorption and evolution of energy take place.

A chemical change is a permanent change

Answer 2

Answer:

following can indicate that a chemical change has taken place, although this evidence is not conclusive:

• Change of odor.

•Change of color (for example, silver to reddish-brown when iron rusts).

• Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat.

Explanation:

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