Question

what are the characteristics of a chemical reaction​

Answer 1

Answer:

Evolution of gas.

Formation of a precipitate.

Change in color.

Change in temperature.

Change in state.

Formation of new substances.

Answer 2

Answer:

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Explanation:

Characteristics of Chemical reaction are -:

1)Evolution of gas. Some chemical reactions are characterised by the evolution of gas.  

2)Formation of precipitate. Some chemical reactions are characterised by the formation of precipitate.

3)Change in colour. Some chemical reactions are characterised by change in colour.

4)Change in temperature.  

5)Change of state