Question

state the characteristics of a chemical reaction given 1 eg each​

Answer 1

Answer:

evolution of gas some chemical reaction are characterized by the evolution gas

Answer 2

Explanation:

Main characteristics of chemical reactions are as follows

1. Evolution of gas

In certain chemical reactions one of the products will be gas Ex:

$Zn+H2SO4→ZnSO4+H2↑  \\ </p><p></p><p></p><p>$

2.Change of ColorSome chemical reactions are characterized by change in color

Ex:

$Fe+CuSo4(aq)→FeSO4+Cu$

3. Formation of precipitate

Few chemical reactions give out insoluble solid substance called as precipitates.

Ex:

$AgNO3+NaClAgCl(ppt)+NaNO3 \\ </p><p>$

4.Change of State

In many chemical reaction change of state is observed. Solid might turn to liquids and gases. Liquids and gases lead to formation of solids.

Ex:

$NH3(g)+HCl(l)⇆NH4Cl(s)$

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