Embibe Experts Solutions for Chapter: General Principles and Processes of Isolation of Metals (Metallurgy), Exercise 4: Exercise-4

Tin and zinc can be refined by:

In the extraction of aluminium:

Process $\mathrm{X}$: employed for red bauxite to remove iron oxide (main impurity).

Process $\mathrm{Y}$ (Serpeck's process): used for white bauxite to remove $\mathrm{Z}$ (main impurity) then,

select the correct option for the process $\mathrm{X}$ and impurity $\mathrm{Z}$.

Which of the following metals may be present in the anode mud during electro-refining of copper?

$\mathrm{I}$. Gold

$\mathrm{II}$. Iron

$\mathrm{III}$. Silver

$\mathrm{IV}$. Magnesium

How many of the following minerals are oxides of metals/metalloids:
(i) Bauxite (ii) Corundum (iii) Dolomite (iv) Malachite (v) Magnetite (vi) Pyrolusite (vii) Argentite (viii) Horn silver (ix) Quartz (x) Cryolite (xi) Siderite (xii) Zincite (xiii) Calamine (xiv) Sylvine (xv) Carnallite

Calculate the number of metals which can be extracted by self-reduction method:

$\mathrm{Cu}, \mathrm{Al}, \mathrm{Fe}, \mathrm{Mg}, \mathrm{Zn}, \mathrm{Sb}, \mathrm{Sn}, \mathrm{Pb}$

Poling process is applied when impurity is the compound of a metal and a non-metal. Atomic number of non-metal is:

How many of the following metals can be purified by electro-refining by using metal as an impure anode.

$\mathrm{Cu}, \mathrm{Al}, \mathrm{Pb}, \mathrm{Sn}, \mathrm{Ag}, \mathrm{Zn}, \mathrm{Ca}, \mathrm{Mg}$

How many of the following refining processes are correctly matched with their element?
Liquation-Tin, Fractional distillation-zinc, Zone refining-Germanium, Poling-Tin, Van Arkel-Titanium, Cupellation-Silver.