Question

Classify each of the following reactions as combination, decomposition, displacement,

Double displacement and electrochemical: [5]

(i) Cu(OH)2 + dil H2SO4 → CuSO4 + 2H2O

(ii) 2KCl

→ 2K + Cl2

(iii) Zn + H2SO4 → ZnSO4 + H2

(iv) 2Fe + 3Cl2 → 2FeCl3

(v) 2NaHCO3
∆
→ Na2CO3 + H2O +CO2​

Answer 1

Answer:

Originally, the term oxidation was used to describe the

addition of oxygen to an element or a compound. Because

of the presence of dioxygen in the atmosphere (~20%),

many elements combine with it and this is the principal

reason why they commonly occur on the earth in the

form of their oxides. The following reactions represent

oxidation processes according to the limited definition of

oxidation:

2 Mg (s) + O2 (g) → 2 MgO (s) (8.1)

S (s) + O2 (g) → SO2 (g) (8.2)

Explanation: