Define the following terms.
$(i)$ Mineral $(ii)$ Ore $(iii)$ Gangue
Define the following terms.
$(i)$ Mineral $(ii)$ Ore $(iii)$ Gangue
$(i)$ Mineral : Most of the elements occur in nature as in combined state as minerals. The chemical composition of minerals is fixed.
$(ii)$ Ore : Minerals from which metals can be extracted profitably are known as ores.
$(iii)$ Gangue: The impurities (sand, silt, soil, gravel, etc.) present in the ore are called gangue.
Similar Questions
Explain the meanings of malleable and ductile
Explain the meanings of malleable and ductile
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 are alloys ?
What are alloys ?
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.
Give reasons : Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
Give reasons : Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.