Embibe Experts Solutions for Chapter: General Principles and Processes of Isolation of Metals (Metallurgy), Exercise 3: Level 3

In blast furnace, iron oxide can be reduced by

a. Coke above $1073 \mathrm{K}$

b. $\mathrm{CO}$ above $1073 \mathrm{K}$

c. $\mathrm{CO}$ below $1073 \mathrm{K}$.

Aluminum is prepared in large quantities by

In the froth flotation process, zinc sulphide and lead sulphide can be separated by:

(i) Using collectors 

(ii) Adjusting the proportion of oil to water

(iii) Using froth stabilisers 

(iv) Using depressants

Choose the set of correct statements among the following.

$\mathrm{a}.$ Ellingham diagram is a plot between  ${\mathrm{\Delta }}_{\mathrm{f}}\mathrm{G}°$ per mole of oxide formed versus temperature.

$\mathrm{b}.$ ${\mathrm{E}}_{\mathrm{line}}$ $\mathrm{C}\to \mathrm{CO}$ slope downwards; so, $\mathrm{C}$ is used as a reducing agent for all the metal oxides.

$\mathrm{c}.$ Slag is easily fusible material that melts at the temperature of the furnace, soluble in the molten metal.

$\mathrm{d}.$ Hydrometallurgy involves the precipitation of ${\mathrm{Cu}}^{2+}$ ions from the solution in the presence of scrap.

$\mathrm{e}.$ Liquation is used when the melting point of the metal is lower than the impurities.

$\mathrm{NaCl}$ and ${\mathrm{CaCl}}_2$ are added to fused ${\mathrm{MgCl}}_2$ in the electrolysis of ${\mathrm{MgCl}}_2$ since:

Give the correct order of initials $\mathrm{T}$ or $\mathrm{F}$ for the following statements. Use $\mathrm{T}$ if statement is true and $\mathrm{F}$ if it is false.
$\left(\mathrm{i}\right)$ In the Gold Schmidt, thermite process aluminium acts as a reducing agent.
$\left(\mathrm{ii}\right)$ $\mathrm{Mg}$ is extracted by electrolysis of an aqueous solution of ${\mathrm{MgCl}}_2$.
$\left(\mathrm{iii}\right)$ Extraction of $\mathrm{Pb}$ is possible by carbon reduction of $\mathrm{PbO}$ in smelting.
$\left(\mathrm{iv}\right)$ Red bauxite is purified by Serpeck's process.

The composition of matte is:
 

What is the atomic number of the common element present in the following ore - Bauxite, haematite, dolomite, zincite