Question

What are the characteristics of chemical reactions? (Any two). ​

Answer 1

Explanation:

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The characteristics of a chemical reaction are :

1. Evolution of gas.
2. Formation of a precipitate.
3. Change in color.
4. Change in temperature.
5. Change in state.
6. Formation of new substances.

Answer 2

Answer:

Answer:Chemical reactions are the processes in which new substances with new properties are formed. Only a rearrangement of atoms takes place in a chemical reaction. The substances which take part in a chemical reaction are called reactants. The new substances produced as a result of chemical reaction are called products.

Explanation:

symbols:

(s)substance is in solid state.

(l):substance is in liquid state

(g):substance is in gaseous state.

(aq):substance is dissolved in water

.

(Δ):heat is applied in the reaction

(arrow pointed upward):gas is relased

(arrow pointed downward):precipitate is formed.

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