(B) . Pure alumina $(Al_2O_3)$ is a bad conductor of electricity and has a very high melting point of about $2000\ ^\circ C$. At this temperature,the

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(B) . Pure alumina $(Al_2O_3)$ is a bad conductor of electricity and has a very high melting point of about $2000\ ^\circ C$. At this temperature,the formed $Al$ metal vaporizes because its boiling point is $1800\ ^\circ C$. To lower the melting point and improve conductivity,$Na_3AlF_6$ (cryolite) and $CaF_2$ (fluorspar) are added to the alumina.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Reduction to free Metal

Easy

In Hall’s process,the main reagent is mixed with

A
$NaF$
B
$Na_3AlF_6$
C
$AlF_3$
D
None of these

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Class 12

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Chapter

General Principles and Processes of Isolation of Elements

Subtopic

Reduction to free Metal

Formation of metallic copper from the sulphide ore in the normal thermo-metallurgical process essentially involves which one of the following reactions?

Medium

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Blister copper is.......

Easy

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In the cyanide process involving extraction of silver,zinc is used industrially as an

Easy

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Which one of the following organizations' iron and steel plant was built to use charcoal as a source of power,to start with,but later switched over to hydroelectricity?

MediumAIIMS 2004

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Upon heating with $Cu_2S$,the reagent$(s)$ that give copper metal is/are:
$(A)$ $CuFeS_2$
$(B)$ $CuO$
$(C)$ $Cu_2O$
$(D)$ $CuSO_4$

IIT 2014

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In Hall’s process,the main reagent is mixed with

Similar Questions

Formation of metallic copper from the sulphide ore in the normal thermo-metallurgical process essentially involves which one of the following reactions?

Blister copper is.......

In the cyanide process involving extraction of silver,zinc is used industrially as an

Which one of the following organizations' iron and steel plant was built to use charcoal as a source of power,to start with,but later switched over to hydroelectricity?

Upon heating with $Cu_2S$,the reagent$(s)$ that give copper metal is/are:$(A)$ $CuFeS_2$$(B)$ $CuO$$(C)$ $Cu_2O$$(D)$ $CuSO_4$

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Upon heating with $Cu_2S$,the reagent$(s)$ that give copper metal is/are:
$(A)$ $CuFeS_2$
$(B)$ $CuO$
$(C)$ $Cu_2O$
$(D)$ $CuSO_4$