In electrometallurgy of aluminium, what will happen if graphite rods are not used as anode and are replaced by some other metal?
- $O_2$ liberated at anode will react with aluminium to give back $Al_2O_3$
- $F_2$ will be liberated at anode instead of $O_2$
- The process of electrometallurgy will become non-spontaneous
- Aluminium oxide splits into $Al^{3+}$ and $O^{2-}$ ions only in presence of graphite
The Correct Option is A
Solution and Explanation
Top Questions on General Principles and Processes of Isolation of Elements
A parallel plate capacitor with plate area \(A\) and plate separation \(d = 2\) m has a capacitance of \(4\mu F\). The new capacitance of the system if half of the space between them is filled with a dielectric material of dielectric constant \(K = 3\) (as shown in the figure) will be:
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A gas can be taken from A to B via two different processes ACB and ADB. When path ACB is used, \( 60 J \) of heat flows into the system and \( 30 J \) of work is done by the system. If path ADB is used, the work done by the system is \( 10 J \). The heat flow into the system in path ADB is:
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A block of mass 1 kg is pushed up a surface inclined to horizontal at an angle of \( 60^\circ \) by a force of 10 N parallel to the inclined surface. When the block is pushed up by 10 m along the inclined surface, the work done against frictional force is:
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Notes on General Principles and Processes of Isolation of Elements
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General Principles and Processes of Isolation of Elements
What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –
- Concentration of the ore
- Isolation of the metal from its concentrated ore
- Purification of the metal