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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Similar Questions
Which of the following changes involve more than two metallurgical processes?
Medium
View SolutionThe correct statements are :
Medium
View SolutionMatch List-$I$ (Substances) with List-$II$ (Processes) used for their production.
List-$I$ (Substances) List-$II$ (Processes) $(a)$ Sulphuric acid $(i)$ Haber process $(b)$ Steel $(ii)$ Bessemer process $(c)$ Sodium hydroxide $(iii)$ Leblanc process $(d)$ Ammonia $(iv)$ Contact process
Choose the correct option for $a-b-c-d$.
| List-$I$ (Substances) | List-$II$ (Processes) |
|---|---|
| $(a)$ Sulphuric acid | $(i)$ Haber process |
| $(b)$ Steel | $(ii)$ Bessemer process |
| $(c)$ Sodium hydroxide | $(iii)$ Leblanc process |
| $(d)$ Ammonia | $(iv)$ Contact process |
Choose the correct option for $a-b-c-d$.
Medium
View SolutionGive the correct order of initials $T$ or $F$ for following statements. Use $T$ if statement is true and $F$ if it is false.
$(i)$ Every mineral is an ore but every ore is not a mineral.
$(ii)$ Slag is a product formed during the extraction of metal by the combination of flux and impurities.
$(iii)$ Highly pure metals can be obtained by zone refining.
$(iv)$ Carnallite is an ore of magnesium and sodium.
$(i)$ Every mineral is an ore but every ore is not a mineral.
$(ii)$ Slag is a product formed during the extraction of metal by the combination of flux and impurities.
$(iii)$ Highly pure metals can be obtained by zone refining.
$(iv)$ Carnallite is an ore of magnesium and sodium.
Medium
View SolutionGiven below are two statements.
Statement $I$: Pig iron is obtained by heating cast iron with scrap iron.
Statement $II$: Pig iron has a relatively lower carbon content than that of cast iron.
In the light of the above statements,choose the correct answer from the options given below.
Statement $I$: Pig iron is obtained by heating cast iron with scrap iron.
Statement $II$: Pig iron has a relatively lower carbon content than that of cast iron.
In the light of the above statements,choose the correct answer from the options given below.
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