Isolation of Elements

Which refining process is generally used in the purification of low melting metals?

Match List-I with List-II :



List - I(Name of ore/mineral)

List - II(Chemical formula)




(a)
Calmine
(i)
\(Zns\)


(b)
Malachite
(ii)
\(FeC{O_3}\)


(c)
Siderite
...

Match List - I with List - II.



List - I (Ore)

List - II (Element Present)




(a)
Kernite
(i)
Tin


(b)
Cassiterite
(ii)
Boron


(c)
Calamine
(iii)
Fluorine
...

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

Match List - I with List - II.



List - I

List - II




(a)
Sodium Carbonate
(i)
Deacon


(b)
Titanium
(ii)
Castner-Kellner


(c)
Chlorine
(iii)
van-Arkel

...

Match List - I with List - II.



List - I

List - II




(a)
Siderite
(i)
Cu


(b)
Calamine
(ii)
Ca


(c)
Malachite
(iii)
Fe


(d)
Cryolite
(iv)...

Given below are two statements :Statement I : The choice of reducing agents for metals extraction can be made by using Ellingham diagram, a plot of \(\Delta\)G vs temperature.Statement II : The value of \(\Delta\)S increases from left to ri...

Given below are two statements :Statement I : Sphalerite is a sulphide or of zinc and copper glance is a sulphide ore of copper.Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using ...

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :

Match List I with List II : (Both having metallurgical terms)
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Ellingham diagram is a graphical representation of :

The method used for the purification of Indium is :

The major components of German Silver are :

The major components in "Gun Metal” are :

Which of the following ore is concentrated using group 1 cyanide salt ?

Math List - I with List - II.



List I (Metal)

List II (Ores)




(a)
Aluminium
(i)
Siderite


(b)
Iron
(ii)
Calamine


(c)
Copper
(iii)
Kaolinite


(d)...

Sulphide ion is soft base and its ores are common for metals.(a) Pb (b) Al (c) Ag (d) Mg

The metal that can be purified economically by fractional distillation method is :

Consider two chemical reactions (A) and (B) that take place during metallurgical process:(A) \(ZnC{O_{3(s)}}\buildrel \Delta \over \longrightarrow Zn{O_{(s)}} + C{O_{2(g)}}\)(B) $$2Zn{S_{(s)}} + 3{O_{2(g)}}\buildrel \Delta \over
\longri...

Calamine and Malachite, respectively, are the ores of :

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 :



List - I

List - II




(a)
Mercury
(i)
Vapour phase refining


(b)
Copper
(ii)
Distillation refining


(c)
Silicon
(iii)
Elect...

The point of intersection and sudden increase in the slope, in the diagram given below, respectively, indicates :

Match List - I with List - II :



List - I

List - II




(a)
Haematite
(i)
\(A{l_2}{O_3}\,.\,x{H_2}O\)


(b)
Bauxite
(ii)
\(F{e_2}{O_3}\)


(c)
Magnetite
(iii)
...

The process that involves the removal of sulphur from the ores is :

Which of the following reduction reaction CANNOT be carried out with coke?

According to the following diagram, A reduces
BO2 when the temperature is :

Among the reactions (a) - (d), the reaction(s)
that does/do not occur in the blast furnace
during the extraction of iron is/are :
(a) CaO + SiO2 \(\to\) CaSiO3
(b) 3Fe2O3 + CO \(\to\) 2Fe3O4 + CO2
(c) FeO + SiO2 \(\to\) FeSiO3
(d) FeO...

The purest from of commercial iron is :

The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :

The incorrect statement is :

The element that can be refined by distillation
is :

An Ellingham diagram provides information
about :

Among statements (a) - (d), the correct ones are
(a) Lime stone is decomposed to CaO during
the extraction of iron from its oxides.
(b) In the extraction of silver, silver is extracted
as an anionic complex.
(c) Nickel is purified by Mond’s...

Cast iron is used for the manufacture of :

The ore that contains both iron and copper is :

The correct statement regarding the given Ellingham diagram is :

The ore that contains the metal in the form of
fluoride is :

The one that is not a carbonate ore is :

Assertion: For the extraction of iron, haematite
ore is used.
Reason: Haematite is a carbonate ore of iron.

With respect to an ore, Ellingham diagram helps to predict the feasibility of its.

The Mond process is used for the

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

The pair that does NOT require calcination is -

The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y, respectively, are :

The correct statement is :

Match the ores (column A) with the metals (column B) :

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Hall- Heroult's process is given by :

The electrolytes usually used in the electroplating of gold and silver, respectively are :

Match the refining methods (Column I) with metals (Column II).

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