Question

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

Answer 1

Metals in the top of the reactivity series are pured by electrolysis process.

Metals in the middle of the reactivity series contains carbonates and sulphides. Carbonates and sulphides both are first converted into oxides by the method of calcination and roasting respectively. Then further the oxides are reduced to metals.

Metals present low in the reactivity series are sulphide ores which are directly reduced using carbon or by displacement reactions.

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 ]