List of top Chemistry Questions on Metallurgy

(i) Write a short note on Gravity Separation process.
(ii) Sulphuric acid is a dehydrating agent. Explain with suitable examples.
Give the basic requirement for vapour phase refining.
What is calcination? Give an example.
Which of the following involves electrolysis?
Match the metals (List-I) with their ores (List-II)\[\begin{array}{|c|c|} \hline \textbf{List-I (Metals)} & \textbf{List-II (Ores)} \\ \hline \text{(A) Mercury (Hg)} & \text{(III) Cinnabar} \\ \hline \text{(B) Lead (Pb)} & \text{(IV) Galena} \\ \hline \text{(C) Manganese (Mn)} & \text{(I) Pyrolusite} \\ \hline \text{(D) Zinc (Zn)} & \text{(II) Calamine} \\ \hline \end{array}\]
In an Ellingham-diagram, if the C/C\(_2\)O line lies below the metal oxide line, then the carbon is used to reduce the metal oxide and itself is oxidized to:
The most stable oxidation state of Iron is:
Using VSEPR theory, predict the species which has square pyramidal shape.
Hoffmann bromamide degradation reaction is shown by which of the following?
Hoffmann bromamide
In the cyanide extraction process of silver, the oxidising and reducing agents used are:
Match List I with List II

List-I

List-II

(A)Van Arkel Method(I)Copper
(B)Zone Refining(II)Titanium
(C)Mond Process(III)Germanism
(D)Electrolytic Refining(IV)Nickel

Choose the correct answer from the options given below:
Match List I with List II

List-I
Ore

List-II
Composition

(A)Calamine(I)CuFeS2
(B)Siderite(II)ZnCO3
(C)Sphalerite(III)ZnS
(D)Copper pyrite(IV)FeCO3

Choose the correct answer from the options given below:
In the extraction process of copper, the product obtained after carrying out the reactions \[ \text{CuO} + \text{H}_2 \rightarrow \text{Cu} + \text{H}_2 \text{O} \] is called:

Match List - I with List - II.

Which of the following ore is concentrated using group 1 cyanide salt ?
In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :
Ellingham diagram is a graphical representation of :
Electrometallurgical process is used to extract
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of \( \text{Al}_2\text{O}_3 \) with cryolite.
Reason (R) : The oxidation state of Al in cryolite is +3.
In the light of the above statements, choose the most appropriate answer from the options given below :
In the electrolytic refining of blister copper, the total number of main impurities, from the following, removed as anode mud is ________.
Pb, Sb, Se, Te, Ru, Ag, Au and Pt.
\( \mathrm{Al_2O_3} \) was leached with alkali to get \( X \). The solution of \( X \), on passing the gas \( Y \), forms \( Z \). \( X, Y \) and \( Z \) respectively are :
Match List - I with List - II :
List - I (a) Mercury (b) Copper (c) Silicon (d) Nickel
List - II (i) Vapour phase refining (ii) Distillation Refining (iii) Electrolytic Refining (iv) Zone Refining Choose the most appropriate answer from the option given below :
The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is :

Match List - I with List - II. 

Thomas slag is