Question

write any two characteristics of chemical reaction and explain it​

Answer 1

Answer:

Explanation:

The characteristics of a chemical reaction are : Evolution of gas. Formation of a precipitate. ... Formation of new substances.

Evolution of gas:

A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide. Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or are explosive.

Formation of new substances:

A chemical reaction happens when substances break apart or combine to form one or more new substances. New substances form when bonds break and new bonds form. The chemical properties of the new substances are different from those of the original substances. ... A precipitate is a solid substance that forms in a solution.

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Answer 2

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The characteristics of a chemical reaction are : Evolution of gas. Formation of a precipitate. Change in color