Class 12ChemistryGeneral Principles and Processes of Isolation of ElementsMix Examples of General Principles and processes of Isolation of Elements
DifficultWhich among the following statement$(s)$ is(are) true for the extraction of aluminium from bauxite?
$A$. Hydrated $Al_2O_3$ precipitates,when $CO_2$ is bubbled through a solution of sodium aluminate.
$B$. Addition of $Na_3AlF_6$ lowers the melting point of alumina.
$C$. $CO_2$ is evolved at the anode during electrolysis.
$D$. The cathode is a steel vessel with a lining of carbon.
$A$. Hydrated $Al_2O_3$ precipitates,when $CO_2$ is bubbled through a solution of sodium aluminate.
$B$. Addition of $Na_3AlF_6$ lowers the melting point of alumina.
$C$. $CO_2$ is evolved at the anode during electrolysis.
$D$. The cathode is a steel vessel with a lining of carbon.
- A$A, B, C$
- B$A, B, C, D$
- C$A, B$
- D$A, C$
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View SolutionWhich of the following methods are not used to refine any metal?
$A$. Liquation $B$. Calcination $C$. Electrolysis $D$. Leaching $E$. Distillation
Choose the correct answer from the options given below.
$A$. Liquation $B$. Calcination $C$. Electrolysis $D$. Leaching $E$. Distillation
Choose the correct answer from the options given below.
Match List $I$ with List $II$.
List $I$ List $II$ $A$. Reverberatory furnace $I$. Pig Iron $B$. Electrolytic cell $II$. Aluminum $C$. Blast furnace $III$. Silicon $D$. Zone Refining furnace $IV$. Copper
| List $I$ | List $II$ |
|---|---|
| $A$. Reverberatory furnace | $I$. Pig Iron |
| $B$. Electrolytic cell | $II$. Aluminum |
| $C$. Blast furnace | $III$. Silicon |
| $D$. Zone Refining furnace | $IV$. Copper |
Column-$I$ Column-$II$ $A$. Metal which occurs in the native state in nature is $P$. $Hg$ $B$. The oxide of metal that can be commercially reduced by Aluminothermic reduction process is $Q$. $Ti$ $C$. van Arkel method is used for preparing ultrapure metal of $R$. $Cr$ $D$. Auto reduction process is employed for the sulphide ore of $S$. $Ag$
| Column-$I$ | Column-$II$ |
| $A$. Metal which occurs in the native state in nature is | $P$. $Hg$ |
| $B$. The oxide of metal that can be commercially reduced by Aluminothermic reduction process is | $Q$. $Ti$ |
| $C$. van Arkel method is used for preparing ultrapure metal of | $R$. $Cr$ |
| $D$. Auto reduction process is employed for the sulphide ore of | $S$. $Ag$ |
Medium
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