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Isolation of Elements

138 Questions
All Exams JEE Mains JEE Advanced TS-EAMCET AP-EAPCET
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th August Evening Shift
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 (iii) $ZnC{O_3}$
(d) Sphalerite (iv) $CuC{O_3}.Cu{(OH)_2}$


Choose the most appropriate answer from the options given below :
A.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
B.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C.
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
D.
(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th August Morning Shift
Which refining process is generally used in the purification of low melting metals?
A.
Chromatographic method
B.
Liquation
C.
Electrolysis
D.
Zone refining
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th August Evening Shift
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 'depressants' in a forth flotation method.

Choose the most appropriate answer from the options given below :
A.
Statement I is true but Statement II is false.
B.
Both Statement I and Statement II are true.
C.
Statement I is false but Statement II is true.
D.
Both Statement I and Statement II are false.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th August Morning Shift
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 right in Ellingham diagram.

In the light of the above statements, choose the most appropriate answer from the options given below :
A.
Both Statement I and Statement II are true
B.
Statement I is false but Statement II is true
C.
Both Statement I and Statement II are false
D.
Statement I is true but Statement II is false
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th July Evening Shift
Which one of the following set of elements can be detected using sodium fusion extract?
A.
Sulfur, Nitrogen, Phosphorous, Halogens
B.
Phosphorous, Oxygen, Nitrogen, Halogens
C.
Nitrogen, Phosphorous, Carbon, Sulfur
D.
Halogens, Nitrogen, Oxygen, Sulfur
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th July Evening Shift
The addition of silica during the extraction of copper from its sulphide ore :-
A.
converts copper sulphide into copper silicate
B.
converts iron oxide into iron silicate
C.
reduces copper sulphide into metallic copper
D.
reduces the melting point of the reaction mixture
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th July Morning Shift
The statement is incorrect about Ellingham diagram is
A.
provides idea about the reaction rate.
B.
provides idea about free energy change.
C.
provides idea about changes in the phases during the reaction.
D.
provides idea about reduction of metal oxide.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th July Evening Shift
Match List I with List II : (Both having metallurgical terms)

List - I List - II
(a) Concentration of Ag ore (i) Reverberatory furnace
(b) Blast furnace (ii) Pig iron
(c) Blister copper (iii) Leaching with dilute NaCN solution
(d) Froth floatation method (iv) Sulfide ores

Choose the correct answer from the options given below :
A.
(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
B.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C.
(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
D.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th July Morning Shift
In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :
A.
TiO2
B.
Fe2O3
C.
ZnO
D.
SiO2
2021 JEE Mains MCQ
JEE Main 2021 (Online) 22th July Evening Shift
Sulphide ion is soft base and its ores are common for metals.

(a) Pb (b) Al (c) Ag (d) Mg
A.
(a) and (c) only
B.
(a) and (d) only
C.
(a) and (b) only
D.
(c) and (d) only
2021 JEE Mains MCQ
JEE Main 2021 (Online) 20th July Evening Shift
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) $2Zn{S_{(s)}} + 3{O_{2(g)}}\buildrel \Delta \over \longrightarrow 2Zn{O_{(s)}} + 2S{O_{2(g)}}$

The correct option of names given to them respectively is :
A.
(A) is calcination and (B) is roasting
B.
Both (A) and (B) are producing same product so both are roasting
C.
Both (A) and (B) are producing same product so both are calcination
D.
(A) is roasting and (B) is calcination
2021 JEE Mains MCQ
JEE Main 2021 (Online) 20th July Morning Shift
The metal that can be purified economically by fractional distillation method is :
A.
Fe
B.
Zn
C.
Cu
D.
Ni
2021 JEE Mains MCQ
JEE Main 2021 (Online) 18th March Evening Shift
Match List - I with List - II :

List - I List - II
(a) Mercury (i) Vapour phase refining
(b) Copper (ii) Distillation refining
(c) Silicon (iii) Electrolytic refining
(d) Nickel (iv) Zone refining


Choose the most appropriate answer from the option given below :
A.
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
B.
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
C.
(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
D.
(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 18th March Morning Shift
The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is :
A.
Cryolite
B.
Bauxite
C.
Calamine
D.
Kaolite
2021 JEE Mains MCQ
JEE Main 2021 (Online) 17th March Evening Shift
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) $CuC{O_3}\,.\,Cu{(OH)_2}$
(d) Malachite (iv) $F{e_3}{O_4}$


Choose the correct answer from the options given below :
A.
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
B.
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
C.
(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
D.
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 17th March Morning Shift
The point of intersection and sudden increase in the slope, in the diagram given below, respectively, indicates :

JEE Main 2021 (Online) 17th March Morning Shift Chemistry - Isolation of Elements Question 64 English
A.
$\Delta$G > 0 and decomposition of the metal oxide
B.
$\Delta$G < 0 and decomposition of the metal oxide
C.
$\Delta$G = 0 and reduction of the metal oxide
D.
$\Delta$G = 0 and melting or boiling point of the metal oxide
2021 JEE Mains MCQ
JEE Main 2021 (Online) 16th March Evening Shift
Which of the following reduction reaction CANNOT be carried out with coke?
A.
ZnO $ \to $ Zn
B.
Fe2O3 $ \to $ Fe
C.
Cu2O $ \to $ Cu
D.
Al2O3 $ \to $ Al
2021 JEE Mains MCQ
JEE Main 2021 (Online) 16th March Morning Shift
The process that involves the removal of sulphur from the ores is :
A.
Roasting
B.
Smelting
C.
Leaching
D.
Refining
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th February Evening Shift
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
(d) Sodium hydroxide (iv) Solvay


Choose the correct answer from the options given below :
A.
(a) $ \to $ (iv), (b) $ \to $ (iii), (c) $ \to $ (i), (d) $ \to $ (ii)
B.
(a) $ \to $ (iv), (b) $ \to $ (i), (c) $ \to $ (ii), (d) $ \to $ (iii)
C.
(a) $ \to $ (iii), (b) $ \to $ (ii), (c) $ \to $ (i), (d) $ \to $ (iv)
D.
(a) $ \to $ (i), (b) $ \to $ (iii), (c) $ \to $ (iv), (d) $ \to $ (ii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th February Evening Shift
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) Al
(v) Zn


Choose the correct answer from the options given below :
A.
(a) $ \to $ (i), (b) $ \to $ (ii), (c) $ \to $ (iii), (d) $ \to $ (iv)
B.
(a) $ \to $ (iii), (b) $ \to $ (i), (c) $ \to $ (v), (d) $ \to $ (ii)
C.
(a) $ \to $ (i), (b) $ \to $ (ii), (c) $ \to $ (v), (d) $ \to $ (iii)
D.
(a) $ \to $ (iii), (b) $ \to $ (v), (c) $ \to $ (i), (d) $ \to $ (iv)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th February Evening Shift
Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?
A.
It is also known as Graham's salt.
B.
It is polymeric compound and is water soluble.
C.
It does not remove Ca2+ ion by precipitation.
D.
Calgon contains the 2nd most abundant element by weight in the Earth's crust.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th February Morning Shift
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
(d) Cryolite (iv) Zinc


Choose the most appropriate answer from the options given below :
A.
(a) $ \to $ (i), (b) $ \to $ (iii), (c) $ \to $ (iv), (d) $ \to $ (ii)
B.
(a) $ \to $ (iii), (b) $ \to $ (i), (c) $ \to $ (ii), (d) $ \to $ (iv)
C.
(a) $ \to $ (ii), (b) $ \to $ (i), (c) $ \to $ (iv), (d) $ \to $ (iii)
D.
(a) $ \to $ (ii), (b) $ \to $ (iv), (c) $ \to $ (i), (d) $ \to $ (iii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th February Evening Shift
The major components of German Silver are :
A.
Zn, Ni and Ag
B.
Cu, Zn and Ni
C.
Cu, Zn and Ag
D.
Ge, Cu and Ag
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th February Evening Shift
The method used for the purification of Indium is :
A.
zone refining
B.
vapour phase refining
C.
liquation
D.
van Arkel method
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th February Morning Shift
Ellingham diagram is a graphical representation of :
A.
$\Delta$G vs P
B.
$\Delta$G vs T
C.
($\Delta$G $-$ T$\Delta$S) vs T
D.
$\Delta$H vs T
2021 JEE Mains MCQ
JEE Main 2021 (Online) 24th February Evening Shift
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) Zinc (iv) Malachite


Choose the correct answer from the options given below :
A.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
B.
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
C.
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D.
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 24th February Morning Shift
The major components in "Gun Metal” are :
A.
Al, Cu, Mg and Mn
B.
Cu, Ni and Fe
C.
Cu, Sn and Zn
D.
Cu, Zn and Ni
2021 JEE Mains MCQ
JEE Main 2021 (Online) 24th February Morning Shift
Which of the following ore is concentrated using group 1 cyanide salt ?
A.
Sphalerite
B.
Malachite
C.
Siderite
D.
Calamine
2021 JEE Mains Numerical
JEE Main 2021 (Online) 31st August Evening Shift
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
2021 JEE Advanced MSQ
JEE Advanced 2021 Paper 1 Online
The correct statement(s) related to the metal extraction processes is (are) :
A.
A mixture of PbS and PbO undergoes self-reduction to produce Pb and SO2
B.
In the extraction process of copper from copper pyrites, silica is added to produce copper silicate.
C.
Partial oxidation of sulphide ore of copper by roasting, followed by self-reduction produces blister copper.
D.
In cyanide process, zinc powder is utilized to precipitate gold from Na[Au(CN)2]
2021 JEE Advanced MSQ
JEE Advanced 2021 Paper 1 Online
A mixture of two salts is used to prepare a solution S, which gives the following results :

JEE Advanced 2021 Paper 1 Online Chemistry - Isolation of Elements Question 12 English
The correct option(s) for the salt mixture is (are)
A.
Pb(NO3)2 and Zn(NO3)2
B.
Pb(NO3)2 and Bi(NO3)3
C.
AgNO3 and Bi(NO3)3
D.
Pb(NO3)2 and Hg(NO3)2
2020 JEE Mains MCQ
JEE Main 2020 (Online) 6th September Evening Slot
The element that can be refined by distillation is :
A.
gallium
B.
nickel
C.
zinc
D.
tin
2020 JEE Mains MCQ
JEE Main 2020 (Online) 6th September Morning Slot
The incorrect statement is :
A.
bronze is an alloy of copper and tin
B.
cast iron is used to manufacture wrought iron
C.
german silver is an alloy of zinc, copper and nickel
D.
brass is an alloy of copper and nickel
2020 JEE Mains MCQ
JEE Main 2020 (Online) 5th September Morning Slot
An Ellingham diagram provides information about :
A.
the temperature dependence of the standard Gibbs energies of formation of some metal oxides
B.
the pressure dependence of the standard electrode potentials of reduction reactions involved in the extraction of metals
C.
the conditions of pH and potential under which a species is thermodynamically stable
D.
the kinetics of the reduction process
2020 JEE Mains MCQ
JEE Main 2020 (Online) 4th September Morning Slot
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 process.
(d) Zr and Ti are purified by Van Arkel method.
A.
(a), (c) and (d) only
B.
(c) and (d) only
C.
(b), (c) and (d) only
D.
(a), (b), (c) and (d)
2020 JEE Mains MCQ
JEE Main 2020 (Online) 2nd September Evening Slot
Cast iron is used for the manufacture of :
A.
wrought iron, pig iron and steel
B.
wrought iron and pig iron
C.
wrought iron and steel
D.
pig iron, scrap iron and steel
2020 JEE Mains MCQ
JEE Main 2020 (Online) 9th January Morning Slot
According to the following diagram, A reduces BO2 when the temperature is : JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Isolation of Elements Question 82 English
A.
> 1400 °C
B.
> 1200 °C but < 1400 °C
C.
< 1400 °C
D.
< 1200 °C
2020 JEE Mains MCQ
JEE Main 2020 (Online) 8th January Evening Slot
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 $ \to $ Fe + ${{1 \over 2}}$O2
A.
(a) and (d)
B.
(c) and (d)
C.
(a)
D.
(d)
2020 JEE Mains MCQ
JEE Main 2020 (Online) 7th January Evening Slot
The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :
A.
liquation
B.
vapour phase refining
C.
distillation
D.
zone refining
2020 JEE Mains MCQ
JEE Main 2020 (Online) 7th January Morning Slot
The purest from of commercial iron is :
A.
pig iron
B.
wrought iron
C.
cast iron
D.
scrap iron and pig iron
2020 JEE Advanced MSQ
JEE Advanced 2020 Paper 2 Offline
Which among the following statement(s) is/are true for the extraction of aluminium from bauxite?
A.
Hydrated Al2O3 precipitates, when CO2 is bubbled through a solution of sodium aluminate.
B.
Addition of Na3AlF6 lowers the melting point of alumina.
C.
CO2 is evolved at the anode during electrolysis.
D.
The cathode is a steel vessel with a lining or carbon.
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th April Evening Slot
The correct statement is :
A.
leaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicate
B.
the Hall-Heroult process is used for the production of aluminium and iron
C.
pig iron is obtained from cast iron
D.
the blistered appearance of copper during the metallurgical process is due to the evolution of CO2
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th April Morning Slot
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 :
A.
washer woman and concentration
B.
fisher woman and concentration
C.
wisher man and reduction
D.
fisher man and reduction
2019 JEE Mains MCQ
JEE Main 2019 (Online) 10th April Evening Slot
The correct statement is :
A.
zincite is a carbonate ore.
B.
Sodium cyanide cannot be used in the metallurgy of silver.
C.
aniline is a froth stabilizer.
D.
zone refining process is used for the refining of titanium.
2019 JEE Mains MCQ
JEE Main 2019 (Online) 10th April Morning Slot
Match the refining methods (Column I) with metals (Column II).
Column I
(Refining Methods)		 Column II
(Metals)
(I) Liquation (a) Zr
(II) Zone Refining (b) Ni
(III) Mond Process (c) Sn
(IV) Van Arkel Method (d) Ga
A.
(I)-(c) ; (II)-(a) ; (III)-(b) ; (IV)-(d)
B.
(I)-(c) ; (II)-(d) ; (III)-(b) ; (IV)-(a)
C.
(I)-(b) ; (II)-(d) ; (III)-(a) ; (IV)-(c)
D.
(I)-(b) ; (II)-(c) ; (III)-(d) ; (IV)-(a)
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th April Evening Slot
Assertion: For the extraction of iron, haematite ore is used.

Reason: Haematite is a carbonate ore of iron.
A.
Both the assertion and reason are correct and the reason is the correct explanation for the assertion.
B.
Only the reason is correct.
C.
Both the assertion and reason are correct, but the reason is not the correct explanation for the assertion.
D.
Only the assertion is correct.
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th April Evening Slot
The one that is not a carbonate ore is :
A.
siderite
B.
bauxite
C.
malachite
D.
calamine
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th April Morning Slot
The ore that contains the metal in the form of fluoride is :
A.
sphalerite
B.
magnetite
C.
malachite
D.
cryolite
2019 JEE Mains MCQ
JEE Main 2019 (Online) 8th April Evening Slot
The Mond process is used for the
A.
Extraction of Zn
B.
extraction of Mo
C.
Purification of Zr and Ti
D.
Purification of Ni
2019 JEE Mains MCQ
JEE Main 2019 (Online) 8th April Morning Slot
With respect to an ore, Ellingham diagram helps to predict the feasibility of its.
A.
Electrolysis
B.
Thermal reducation
C.
Vapour phase refining
D.
Zone refining