Question

Suggest different chemical processes used for obtaining a metal from its oxides for metal in the middle of reactivity series and metals towards to top of the reactivity series support your answer with one example each

Answer 1

1.By using certain reducing agents such as carbon for the elements in the middle of the reactivity series
eg: ZnO+C >>>>> Zn+ CO

2.elements in top of activity series are obtained by electrolytic reduction
eg: sodium
at cathode Na^+ +e^- >>> Na
at anode 2Cl^- >>>>Cl2 +2e^-

Answer 2

Answer:

1 ) .Reactivity series :

It is series of decreasing order of metals' reactivity. Hydrogen is place in middle of series. Above hydrogen metals are more reactive in nature below are less. Metal which is more reactive it displaces a less reactive metal from its salt solution.

2 ) .

In order to obtaining a metal from its  oxides for metals in the middle of the reactivity series then metals towards oxides of such metals can be reduced with coke (carbon) which acts as a reducing agent.

For instance :

2 Fe₂O₃ + 3 C  ⇒ 4 Fe + 3 CO₂.

In order to obtaining a metal from its  oxides for metals in the high of the reactivity series their oxides are reduced to metals by the process of electrolysis

For instance :

Electrolysis of sodium chloride :

Na⁺ + e⁻  ⇒ Na   [ At cathode ]

2 Cl⁻ ⇒ Cl₂ + 2 e⁻   [ At anode ]