Question

give the characteristics of chemical reaction.explain any two'them​

Answer 1

Answer:

1) Evolution of gas: In many chemical reactions, one of the products is gas. 2) Change of colour: certain chemical reactions are characterized by a change in the colour of the reactants. ... 4)Change of state: in many chemical reactions, a change of state is observed.

Answer 2

Answer:

Explanation:

The characteristics of a chemical reaction are :

Evolution of gas.

Formation of a precipitate.

Change in color.

Change in temperature.

Change in state.

Formation of new substances