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Previous year question hub

Isolation Of Elements - Inorganic Chemistry - Chemistry Previous Year Questions

Practice Isolation Of Elements - Inorganic Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

103Papers
14Years
112Questions
1Topics

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Easy 98 87.5%
Medium 14 12.5%

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Multiple Choices 109 97.3%
Numerical Answer Type (NAT) 3 2.7%

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Chemistry
112 Qs

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Inorganic Chemistry
112 Qs

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Isolation Of Elements
112 Qs

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JEE MAIN 2025 ONLINE 28TH JANUARY EVENING SHIFT
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JEE MAIN 2023 ONLINE 10TH APRIL EVENING SHIFT
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All Isolation Of Elements previous year questions

Practice every matching question in batches of 20, with every available option.

1
2002 · Chemistry · Inorganic Chemistry · Isolation Of Elements
AIEEE 2002
Aluminium is extracted by the electrolysis of
A
bauxite
B
alumina
C
alumina mixed with molten cryolite
D
molten cryolite
Open complete paper
2
2002 · Chemistry · Inorganic Chemistry · Isolation Of Elements
AIEEE 2002
The metal extracted by leaching with a cyanide is
A
Mg
B
Ag
C
Cu
D
Na
Open complete paper
3
2004 · Chemistry · Inorganic Chemistry · Isolation Of Elements
AIEEE 2004
Which one of the following ores is best concentrated by froth – floatation method?
A
Magnetite
B
Malachite
C
Galena
D
Cassiterite
Open complete paper
4
2005 · Chemistry · Inorganic Chemistry · Isolation Of Elements
AIEEE 2005
During the process of electrolytic refining of copper, some metals present as impurity settle as ‘anode mud’ These are
A
Sn and Ag
B
Pb and Zn
C
Ag and Au
D
Fe and Ni
Open complete paper
5
2008 · Chemistry · Inorganic Chemistry · Isolation Of Elements
AIEEE 2008
Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly?
A
Metal sulphides are thermodynamically more stable than CS2
B
CO2 is thermodynamically more stable than CS2
C
Metal sulphides are less stable than the corresponding oxides
D
CO2 is more volatile than CS2
Open complete paper
6
2012 · Chemistry · Inorganic Chemistry · Isolation Of Elements
AIEEE 2012
Which method of purification is represented by the following equation :
Ti (s) + 2I2 (g) \(\buildrel {523K} \over \longrightarrow\) TiI4 (g) \(\buildrel {1700K} \over \longrightarrow\) Ti (s) + 2I2 (g)
A
zone refining
B
cupellation
C
Poling
D
Van Arkel
Open complete paper
7
2015 · Chemistry · Inorganic Chemistry · Isolation Of Elements
JEE MAIN 2015 OFFLINE
In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?
A
Al2O3 is mixed with CaF2 which lowers the melting point of the mixture and brings conductivity
B
Al3+ is reduced at the cathode to form Al
C
Na3AlF6 serves as the electrolyte
D
CO and CO2 are produced in this process
Open complete paper
8
2016 · Chemistry · Inorganic Chemistry · Isolation Of Elements
JEE MAIN 2016 OFFLINE
Which one of the following ores is best concentrated by froth floatation method?
A
Siderite
B
Galena
C
Malachite
D
Magnetite
Open complete paper
9
2016 · Chemistry · Inorganic Chemistry · Isolation Of Elements
JEE MAIN 2016 ONLINE 10TH APRIL MORNING SLOT
Extraction of copper by smelting uses silica as an additive to remove :
A
Cu2S
B
FeO
C
FeS
D
Cu2O
Open complete paper
10
2018 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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
Open complete paper
11
2018 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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
Open complete paper
12
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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.
Open complete paper
13
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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)
Open complete paper
14
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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]–
Open complete paper
15
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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
Open complete paper
16
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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)
Open complete paper
17
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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
Open complete paper
18
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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
Open complete paper
19
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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
Open complete paper
20
2019 · Chemistry · Inorganic Chemistry · Isolation Of Elements
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
Open complete paper

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