Hall Heroult's process is given by:

Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-3>Q 43

The reaction that does not define calcination is

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-3>Q 44

In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of:

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-3>Q 45

The pair that does $\mathrm{NOT}$ Require calcination is :

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 1

For given processes, choose the correct order of purity of silicon obtained.
$\mathrm{I}$. ${\mathrm{SiO}}_2+2\mathrm{C}⟶\mathrm{Si}+2\mathrm{CO}$
$\mathrm{II}$.$\mathrm{Si} \left(\mathrm{pure}\right)+2{\mathrm{Cl}}_2⟶{\mathrm{SiCl}}_4$
${\mathrm{SiCl}}_4+2\mathrm{Mg}\to \mathrm{Si}+{\mathrm{MgCl}}_2$
$\mathrm{III}$. ${\mathrm{Na}}_2\left[{\mathrm{SiF}}_6\right]+4\mathrm{Na}⟶6\mathrm{NaF}+\mathrm{Si}⟶\mathrm{Zone}$ refined $\mathrm{Si}$

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 2

The rocky and silicious matter associated with an ore is called:

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 3

The process of removing lighter gangue particles by washing in a current of water is called:

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 4

Gravity separation method is based upon:

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Alpha Question Bank for Engineering: Chemistry>Chapter 18 - General Principles and Processes of Isolation of Metals (Metallurgy)>Exercise-4>Q 5

In the froth floatation process for the purification of minerals the particles float because: