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)
Choose the correct answer from the options given below :
| 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) 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) $ZnC{O_{3(s)}}\buildrel \Delta \over \longrightarrow Zn{O_{(s)}} + C{O_{2(g)}}$
(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 :
Choose the most appropriate answer from the option given below :
| 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 :
Choose the correct answer from the options given below :
| 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 :
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.
Choose the correct answer from the options given below :
| 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.
Choose the correct answer from the options given below :
| 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.
Choose the most appropriate answer from the options given below :
| 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.
Choose the correct answer from the options given below :
| 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
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) 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 :
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) 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
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.
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
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th January Evening Slot
The pair that does NOT require calcination is -
A.
Fe2O3 and CaCO3⋅MgCO3
B.
ZnCO3 and CaO
C.
ZnO and Fe2O3⋅xH2O
D.
ZnO and MgO
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th January Morning Slot
In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of -
A.
Copper
B.
Platinum
C.
Carbon
D.
Pure aluminium
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 11th January Morning Slot
Match the ores (column A) with the metals (column B) :
| (Column A) ores | (Column B) Metals | ||
|---|---|---|---|
| (I) | Siderite | (a) | Zinc |
| (II) | Kaolinite | (b) | Copper |
| (III) | Malachite | (c) | Iron |
| (IV) | Calamine | (d) | Aluminium |
A.
(I)-(c); (II)-(d); (III)-(b); (IV)-(a)
B.
(I)-(a); (II)-(b); (III)-(c); (IV)-(d)
C.
(I)-(b); (II)-(c); (III)-(d); (IV)-(a)
D.
(I)-(c); (II)-(d); (III)-(a); (IV)-(b)
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th January Evening Slot
The electrolytes usually used in the electroplating of gold and silver, respectively are :
A.
[Au(CN)2]– and [Ag(CN)2]–
B.
[Au(CN)2]– and [Ag(Cl)2]–
C.
[Au(OH)4]– and [Ag(OH)2]–
D.
[Au(NH3)2]– and [Ag(CN)2]–
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th January Morning Slot
Hall- Heroult's process is given by :
A.
Cu2+ (aq) + H2(g) $ \to $ Cu(s) + 2H+ (aq)
B.
Cr2O3 + 2AI $ \to $ Al2O3 + 2Cr
C.
2Al2O3 + 3C $ \to $ 4Al + 3CO2
D.
ZnO + C $\buildrel {Coke,\,1673\,K} \over
\longrightarrow $ Zn + CO
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th January Evening Slot
The correct statement regarding the given Ellingham diagram is :
A.
At 1400oC, Al can be used for the extraction of Zn from ZnO
B.
At 500oC, coke can be used for the extraction of Zn from ZnO
C.
Coke cannot be used for the extraction of Cu from Cu2O.
D.
At 800oC, Cu can be used for the extraction of Zn from ZnO.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th January Morning Slot
The ore that contains both iron and copper is :
A.
Copper Pyrites
B.
Malachite
C.
Dolomite
D.
Azurite
2018
JEE Mains
MCQ
JEE Main 2018 (Online) 16th April Morning Slot
In the extraction of copper from its sulphate ore, metal is finally obtained by the oxidation of cuprous sulphide with :
A.
Fe2O3
B.
Cu2O
C.
SO2
D.
CO
2018
JEE Mains
MCQ
JEE Main 2018 (Online) 15th April Evening Slot
In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When CO2 gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' respectively are :
A.
NaAlO2 and Al2(CO3)3.x H2O
B.
A(OH)3 and Al2O3.x H2O
C.
Na[Al(OH)4] and Al2O3.x H2O
D.
Na[Al(OH)4] and Al2(CO3)3.x H2O
