What chemical process is used for obtaining a metal from its oxide ?
What chemical process is used for obtaining a metal from its oxide ?
The chemical process used for obtaining a metal from its oxide is reduction. In this process, metal oxides are reduced by using suitable reducing agents such as carbon or by highly reactive metals to displace the metals from their oxides.
For example, zinc oxide is reduced to metallic zinc by heating with carbon.
$Zn{{O}_{(s)}}\,+\,{{C}_{(s)}}\xrightarrow{\Delta }Z{{n}_{(s)}}\,+\,C{{O}_{(g)}}$
Manganese dioxide is reduced to manganese by treating it with aluminium powder. In this case, aluminium displaces manganese from its oxide.
$3Mn{{O}_{2(s)}}\,+\,4A{{l}_{(s)}}\,\to \,$ $3M{{n}_{(l)}}\,+\,2A{{l}_{2}}{{O}_{3(s)}}\,+\,Heat$
Oxides of more reactive metals are reduced by electrolysis.
Similar Questions
You are given a hammer, a battery, a bulb, wires and a switch.
$(a)$ How could you use them to distinguish between samples of metals and non-metals ?
$(b)$ Assess the usefulness of these tests in distinguishing between metals and non-metals.
You are given a hammer, a battery, a bulb, wires and a switch.
$(a)$ How could you use them to distinguish between samples of metals and non-metals ?
$(b)$ Assess the usefulness of these tests in distinguishing between metals and non-metals.
Samples of four metals $A$, $B$, $C$ and $D$ were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
Metal
Iron $(II)$ sulphate
Cooper $(II)$ sulphate
zinc sulphate
Silver nitrate
$A.$
No reaction
Displacement
$B.$
Displacement
No reaction
$C.$
No reaction
No reaction
No reaction
Displacement
$D.$
No reaction
No reaction
No reaction
No reaction
Use the Table above to answer the following questions about metals $A$, $B$, $C$ and $D$.
$(i)$ Which is the most reactive metal ?
$(ii)$ What would you observe if $B$ is added to a solution of Copper $(II)$ sulphate ?
$(iii)$ Arrange the metals $A$, $B$, $C$ and $D$ in the order of decreasing reactivity.
Samples of four metals $A$, $B$, $C$ and $D$ were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
| Metal | Iron $(II)$ sulphate | Cooper $(II)$ sulphate | zinc sulphate | Silver nitrate |
| $A.$ | No reaction | Displacement | ||
| $B.$ | Displacement | No reaction | ||
| $C.$ | No reaction | No reaction | No reaction | Displacement |
| $D.$ | No reaction | No reaction | No reaction | No reaction |
Use the Table above to answer the following questions about metals $A$, $B$, $C$ and $D$.
$(i)$ Which is the most reactive metal ?
$(ii)$ What would you observe if $B$ is added to a solution of Copper $(II)$ sulphate ?
$(iii)$ Arrange the metals $A$, $B$, $C$ and $D$ in the order of decreasing reactivity.
In the electrolytic refining of a metal $M$, what would you take as the anode, the cathode and the electrolyte ?
In the electrolytic refining of a metal $M$, what would you take as the anode, the cathode and the electrolyte ?
What type of oxides are formed when non-metals combine with oxygen?
What type of oxides are formed when non-metals combine with oxygen?
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.