Give two characteristics of a chemical reaction.
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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.
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Characteristics of chemical reaction are as:
i) Evoluation of gas. Some chemical reactions are characterised by the evolution of gas.
ii) Change in colour. Some chemical reactions are characterised by the change in colour.
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