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General Principles and Processes of Isolation of Metals — JEE Main & Advanced Chemistry PYQs

226 previous year questions from General Principles and Processes of Isolation of Metals with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

226 questionsChemistrySolutions on every page
1

Identify the incorrect pair from the following :

JEE Main 2024 Solution View → 2

The correct statement(s) related to processes involved in the extraction of metals is(are)

JEE Advanced 2023 Solution View → 3

Which one of the following is not an example of calcination?

JEE Main 2023 Solution View → 4

Given below are two statements related to Ellingham diagram : Statement I : Ellingham diagrams can be constructed for formation of oxides, sulphides and halides of metals. Statemen

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Which one of the following is most likely a mismatch?

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: In the Ellingham diagram, a sharp change in slope of the line is o

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Given below are two statements: Statement I: In the metallurgy process,sulphide ore is converted to oxide before reduction. Statement II: Oxide ores in general are easier to reduce

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In the extraction process of copper, the product obtained after carrying out the reactions (i) 2 Cu 2 S + 3 O 2 ⟶ 2 Cu 2 O + 2 SO 2 (ii) 2 Cu 2 O + Cu 2 S ⟶ 6 Cu + SO

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Which of the following is used as a stabilizer during the concentration of sulphide ores?

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In Hall-Heroult process, the following is used for reducing Al 2 O 3 :-

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Which of the following metals can be extracted through alkali leaching technique?

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Among following compounds, the number of those present in copper matte is A. CuCO 3 B. Cu 2 S C. Cu 2 O D. FeO

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : In an Ellingham diagram, the oxidation of carbon to carbon monoxi

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Which one of the following statements is incorrect ?

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The methods NOT involved in concentration of ore are (A) Liquation (B) Leaching (C) Electrolysis (D) Hydraulic washing (E) Froth floatation Choose the correct answer from the optio

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Given below are two statements: Statement I: During Electrolytic refining, the pure metal is made to act as anode and its impure metallic form is used as cathode. Statement II: Dur

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In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:

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The major component of which of the following ore is sulphide based mineral?

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The reaction representing the Mond process for metal refining is ______

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Given below are two statements:- Statement I:- In froth floatation method a rotating paddle agitates the mixture to drive air out of it. Statement II:- Iron pyrites are generally a

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Which one of the following reactions does not occur during extraction of copper ?

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The metal which is extracted by oxidation and subsequent reduction from its ore is :

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Match List I with List II. List I List II A. Reverberatory furnace I. Pig iron B. Electrolytic cell II. Aluminium C. Blast furnace III. Silicon D. Zone refining furnace IV. Copper

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The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range 900 - 1500 K is(are)

JEE Advanced 2022 Solution View → 25

The electrochemical extraction of aluminium from bauxite ore involves

JEE Advanced 2022 Solution View → 26

In liquation process used for tin Sn , the metal

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In metallurgy the term "gangue" is used for

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Which of the reaction is suitable for concentrating ore by leaching process?

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Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores of iron is

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Which of the following methods are not used to refine any metal? (A) Liquation (B) Calcination (C) Electrolysis (D) Leaching (E) Distillation Choose the correct answer from the opt

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The metal that is not extracted from its sulphide ore is

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Refining using liquation method is the most suitable for metals with

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Given below are two statements. Statement I : Pig iron is obtained by heating cast iron with scrap iron. Statement II : Pig iron has a relatively lower carbon content than that of

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The compound(s) that is(are) removed as slag during the extraction of copper is : (1) CaO (2) FeO (3) Al 2 O 3 (4) ZnO (5) NiO Choose the correct answer from the options given belo

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Match List I with List II . List I With Ore List II Composition A.Siderite I. FeCO 3 B.Malachite II. CuCO 3 · Cu ( OH ) 2 C.Sphalerite III. ZnS D.Calamine IV. ZnCO 3 Choose th

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In isolation of which one of the following metals from their ores, the use of cyanide salt is commonly not involved?

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In the metallurgical extraction of copper, following reaction is used : FeO + SiO 2 → FeSiO 3 FeO and FeSiO 3 respectively are.

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Given are two statements one is labelled as Assertion and other is labelled as Reason. Assertion : Magnesium can reduce Al 2 O 3 at a temperature below 1350 ° C , while above

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Statement I: Leaching of gold with cyanide ion in absence of air / O 2 leads to cyano complex of Au (III). Statement II: Zinc is oxidized during the displacement reaction carried o

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Match List - I with List - II. List-I List-II A Concentration of gold ore I Aniline B Leaching of alumina II NaOH C Froth stabiliser III SO 2 D Blister copper IV NaCN Choose the co

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The role of depressants in 'Froth Floation method' is to

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Given below are two statements : Statement I : According to the Ellingham diagram, any metal oxide with higher ΔG ° is more stable than the one with lower ΔG °

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Given below are two statements. Statement I: During electrolytic refining. blister copper deposits precious metals. Statement II: In the process of obtaining pure copper by electro

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Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex A , which on reaction with zinc forms the elemental gold and another complex B . A and B ,

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Which of the following chemical reactions represents Hall-Heroult Process?

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(a) Baryte, (b) Galena, (c) Zinc blende and (d) Copper pyrites. How many of these minerals are sulphide based?

JEE Main 2022 Solution View → 47

Match List - I with List - II : List-I List-II (A) Sphalerite (I) FeCO 3 (B) Calamine (II) PbS (C) Galena (III) ZnCO 3 (D) Siderite (IV) ZnS Choose the most appropriate answer from

JEE Main 2022 Solution View → 48

The correct statement s related to the metal extraction processes is(are)

JEE Advanced 2021 Solution View → 49

Calamine and Malachite, respectively, are the ores of :

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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

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Treatment of bromine water with propene yields 1-bromoprop

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Match List-I with List-II : List-I (Name of ore/mineral) List-I (Chemical formula) a Calamine i ZnS b Malachite ii FeCO 3 c Siderite iii ZnCO 3 d Sphalerite iv CuCO 3 · Cu ( O

JEE Main 2021 Solution View → 53

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

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Given below are two statements: Statement I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper. Statement II : It is possible to separate two sulp

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Given below are two statements. Statement I: The choice of reducing agents for metals extraction can be made by using the Ellingham diagram, a plot of Δ G vs temperature. Stat

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The addition of silica during the extraction of copper from its sulphide ore :-

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The statement that is INCORRECT about Ellingham diagram is

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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 coppe

JEE Main 2021 Solution View → 59

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

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Sulphide ion is soft base and its ores are common for metals a Pb b Al c Ag d Mg Choose the correct answer from the options given below

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Consider two chemical reactions (A) and (B) that take place during metallurgical process: (A) ZnCO 3 s ⟶ Δ ZnO s + CO 2 g (B) 2 ZnS s + 3 O 2 g ⟶ Δ 2 ZnO s

JEE Main 2021 Solution View → 62

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

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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

JEE Main 2021 Solution View → 64

The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is:

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Match List-I and List-II : List-I List-II a Haematite i Al 2 O 3 · xH 2 O b Bauxite ii Fe 2 O 3 c Magnetite iii CuCO 3 · Cu ( OH ) 2 d Malachite iv Fe 3 O 4 Choose the co

JEE Main 2021 Solution View → 66

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

JEE Main 2021 Solution View → 67

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

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

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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

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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 option

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Match List- I with List- II . List- I (Ore) List- II (Element Present) a Kernite p Tin b Cassiterite q Boron c Calamine r Fluorine d Cryolite s Zinc Choose the most appropriate ans

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The method used for the purification of Indium is:

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Ellingham diagram is a graphical representation of :

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Match 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

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

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Which among the following statement(s) is (are) true for the extraction of aluminium from bauxite?

JEE Advanced 2020 Solution View → 77

The element that can be refined by distillation is :

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Boron and silicon of very high purity can be obtained through :

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An Ellingham diagram provides information about:

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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

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Cast iron is used for the manufacture of :

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According to the following diagram, A reduces B O 2 when the temperature is:

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The major product in the following reaction is:

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

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The purest form of commercial iron is:

JEE Main 2020 Solution View → 86

Which one of the following ores is best concentrated by froth floatation method?

NTA Abhyas JEE Main 2020 Solution View → 87

The method of zone refining of metals is based on the principle of

NTA Abhyas JEE Main 2020 Solution View → 88

Electrometallurgical process is used to extract

NTA Abhyas JEE Main 2020 Solution View → 89

Four metals and their methods of refinement are given i. Ni, Cu, Zr, Ga ii. Electrolysis, van-Arkel process, Zone refining, Mond's process Choose the right method for each.

NTA Abhyas JEE Main 2020 Solution View → 90

Pb and S n are extracted from their chief ore respectively by

NTA Abhyas JEE Main 2020 Solution View → 91

The electrolytic method of reduction is employed for the preparation of metals that

NTA Abhyas JEE Main 2020 Solution View → 92

Van-Arkel process and Mond's process are respectively used for refining of:

NTA Abhyas JEE Main 2020 Solution View → 93

In blast furnace iron oxide is reduced by

NTA Abhyas JEE Main 2020 Solution View → 94

Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out

NTA Abhyas JEE Main 2020 Solution View → 95

Which of the following processes involves smelting

NTA Abhyas JEE Main 2020 Solution View → 96

Metal which can be extracted from all the three dolomite, magnesite and carnallite is

NTA Abhyas JEE Main 2020 Solution View → 97

Match list I with List II and select the correct answer using the codes given below List I List II (Types of ore) (example) P Oxide ore A. Feldspar Q Sulphide ore B. Barytes R Sulp

NTA Abhyas JEE Main 2020 Solution View → 98

CN − solution used in extraction of which metal?

NTA Abhyas JEE Main 2020 Solution View → 99

Gold is leached using CN − solution followed by reduction with Zn . What is the co-ordination number of Zn in the final product?

NTA Abhyas JEE Main 2020 Solution View → 100

White bauxite is leached by

NTA Abhyas JEE Main 2020 Solution View → 101

Which among the following is not a carbonate ore? : -

NTA Abhyas JEE Main 2020 Solution View → 102

Oxidation state of iron and chromium in chromite ore is:

NTA Abhyas JEE Main 2020 Solution View → 103

Incorrect statement related to extraction of copper from copper pyrite is:

NTA Abhyas JEE Main 2020 Solution View → 104

In the extraction of C u , the metal is formed in the Bessemer converter due to the reaction:

NTA Abhyas JEE Main 2020 Solution View → 105

Which one of the following reactions is an example for calcination process?

NTA Abhyas JEE Main 2020 Solution View → 106

How many of the following species are related to Hall's process of purification of bauxite? White bauxite, Na 2 CO 3 , CO 2 , cryolite, red bauxite, NaOH

NTA Abhyas JEE Main 2020 Solution View → 107

Gallium arsenide is purified by

NTA Abhyas JEE Main 2020 Solution View → 108

Which reaction does not occur in roasting process.

NTA Abhyas JEE Main 2020 Solution View → 109

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 + SiO 2 → CaSiO 3 b   3   Fe 2 O 3

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Which of the following mineral does not contain A l .

NTA Abhyas JEE Main 2020 Solution View → 111

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are

NTA Abhyas JEE Main 2020 Solution View → 112

Sulphide ores are common for the metals

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When a metal is electroplated with silver (Ag)

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The number of correctly matched combination is/are Ore Element Chalcopyrite Cu Limestone Ca Corundum Al Magnetite Fe Pyrolusite Mn Cassiterite Zn Cinnabar Hg Calamine Ca Siderite S

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The pair that does not require calcination is

NTA Abhyas JEE Main 2020 Solution View → 116

Heating mixture of Cu 2 O and Cu 2 S will give

NTA Abhyas JEE Main 2020 Solution View → 117

Among the following metals the number of metals that are extracted by self-reduction method from their respective ores is Hg, Zn, Cu, Al, Mg, Pb, Fe, Na.

NTA Abhyas JEE Main 2020 Solution View → 118

Which of the following statements is incorrect?

NTA Abhyas JEE Main 2020 Solution View → 119

Match the column (I) and (II) and select the correct answer using the codes given below. Column-I Column-II (I) Argentite (1) Halide ore (II) Cuprite (2) Carbonate ore (III) Sideri

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During the process of electro refining of copper, some metals present as impurity settle down as anode mud. These are:

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