Question

Q1. What do you mean by a chemical reaction?
Give 2 examples of chemical reactions from
daily life situations.

Q2. Mention 3 ways by which chemical equations
can be made more informative.​

Answer 1

Explanation:

Chemical reactions often involve color changes, temperature changes, gas production, or precipitant formation. Simple examples of everyday reactions include digestion, combustion, and cooking.

Answer

(a) The various ways in which a chemical equation can be made more informative are :

(i) By indicating the physical states of the reactants and products. ...

Zn (s) + H2SO4 (aq) ZnSO4 (aq) + H2 (g)

(ii) By indicating the heat changes taking place in the reaction. ...

C (s) + O2 (g) CO2 (g) + Heat.

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