Quantrex Academy Quantrex AcademyPYQs with solutions · JEE · NEET · NDA

Home · NEET UG · Chemistry · General Principles and Processes of Isolation of Metals

General Principles and Processes of Isolation of Metals — NEET UG Chemistry PYQs

388 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.

388 questionsChemistrySolutions on every page
1

The reaction that does NOT takes place in blast furnace between 900K and 1500K temperature range during the extraction of iron is:

NEET 2023 Solution View → 2

Read the following statements and choose the set of correct statements: (A) Chrome steel is used for cutting tools and crushing machines. (B) The fine dust of aluminium is used in

NEET 2023 Solution View → 3

Match List-I with List-II. List-I (Ores) List-II (Composition) (a) Haematite (i) Fe 3 O 4 (b) Magnetite (ii) ZnCO 3 (c) Calamine (iii) Fe 2 O 3 (d) Kaolinite (iv) Al 2 ( OH ) 4 Si

NEET 2022 Solution View → 4

Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?

NEET 2021 Solution View → 5

The maximum temperature that can be achieved in blast furnace is:

NEET 2021 Solution View → 6

Identify the correct statement from the following:

NEET 2020 Solution View → 7

Match the elements in Column I with methods of purification in Column II. Column-I Column-II (a) Boron (p) Van Arkel method (b) Tin (q) Mond's process (c) Zirconium (r) Liquati

NEET 2020 Solution View → 8

Assertion : ZrI ₄ is useful in purification of zirconium (Zr). Reason : ZrI ₄ sublimise at room temperature.

AIIMS 2019 Solution View → 9

Match the Column-I with Column-II.

AIIMS 2019 Solution View → 10

Which one is malachite from the following?

NEET 2019 Solution View → 11

Identify the incorrect statement.

NEET 2019 Solution View → 12

The first step in the extraction of copper is

AIIMS 2018 Solution View → 13

Assertion : Zone refining is based on the solubility of impurities in the molten state than in the solid state of the metal. Reason : Pure metal oxide is obtained in zone refining.

AIIMS 2018 Solution View → 14

Which process is used in smelting during metallurgy of copper?

AIIMS 2018 Solution View → 15

In the extraction of copper from its sulphide ore, the metal is formed by the reduction of Cu ₂ O with

JIPMER 2018 Solution View → 16

Lead is extracted from galena ( PbS ) , either by following ways. Auto-reduction process is

JIPMER 2018 Solution View → 17

Considering Ellingham diagram, which of the following metals can be used to reduce alumina?

NEET 2018 Solution View → 18

Assertion : Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal. Reason:Copper is extracted by hydrometallur

AIIMS 2017 Solution View → 19

In cyamide extraction process of silver from argentite ore, the oxidising and reducing agents are respectively.

JIPMER 2017 Solution View → 20

Extraction of gold and silver involves leaching with C N - ion. Silver or gold is later recovered by:

NEET 2017 Solution View → 21

Oil used as frothing agent in froth-floatation process is

AIIMS 2016 Solution View → 22

For the formation of Cr ₂ O ₃ and Al ₂ O ₃ , values of _f G^ are 540 ~kJ ~mol ⁻¹ and -827 ~kJ ~mol ⁻¹ respectively. What will be the possibility for reaction of Cr ₂ O ₃ by Al ?

JIPMER 2016 Solution View → 23

Lime stone is added in the extraction of lead from galena why?

JIPMER 2016 Solution View → 24

Match items of column-I with the items of column-II and assign the correct code: Column I Column II ( a ) Cyanide process ( i ) Ultrapure Ge ( b ) Froth floatation process ( ii ) D

NEET 2016 Solution View → 25

The composition of carnallite is

AIIMS 2015 Solution View → 26

Which of the following is not the correct match?

AIIMS 2015 Solution View → 27

The catenation tendency of C , Si and Ge is in the order Ge Si C . The bond energies (in kJ mol ⁻¹ ) of C - C , Si - Si and Ge - Ge bonds, respectively are

JIPMER 2015 Solution View → 28

The major role of fluorspar ( CaF ₂ ) which is added in small quantity in the electrolytic reduction of alumina dissolved in fused cryolite ( Na ₃ AlF ₆ ) is I. as a catalyst. II.

JIPMER 2015 Solution View → 29

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:

NEET 2015 Solution View → 30

"Metals are usually not found as nitrates in their ores". Out of the following two (a and b) reasons which is or are true for the above observation? (a) Metal nitrates are highly u

NEET 2015 Solution View → 31

Slag formed in blast furnace, removes the impurity of

AIIMS 2014 Solution View → 32

When CO ₂ is passed through solution of sodium aluminate, precipitate of which compound is formed?

AIIMS 2014 Solution View → 33

Which of the following pair of metals is purified by van- Arkel method?

JIPMER 2014 Solution View → 34

What is the role of aniline or cresol when added in a froth floatation process?

AIIMS 2013 Solution View → 35

A number of elements available in earth's crust but most abundant elements are

JIPMER 2013 Solution View → 36

The metal oxide which cannot be reduced to metal by carbon is:

NEET 2013 Solution View → 37

Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of aci

NEET 2013 Solution View → 38

The extraction of which of the following metals involves bessemerisation?

JIPMER 2012 Solution View → 39

Aluminium is extracted from alumina ( Al ₂ O ₃ ) by electrolysis of a molten mixture of

NEET 2012 Solution View → 40

Which one of the following is a mineral of iron?

NEET 2012 Solution View → 41

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with

NEET 2012 Solution View → 42

Leaching is a process of

JIPMER 2011 Solution View → 43

Which of the following pairs of metals is purified by van Arkel method?

NEET 2011 Solution View → 44

The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.

NEET 2011 Solution View → 45

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

NEET 2011 Solution View → 46

To dissolve argentite ore which of the following is used?

JIPMER 2009 Solution View → 47

Steel is heated to below red heat and then, cooled slowly. The process refers to

JIPMER 2009 Solution View → 48

The purification of alumina is called

AIIMS 2008 Solution View → 49

Carbon and ( CO ) gas are used to reduce which of the following pairs of metal oxides for extraction of metals?

AIIMS 2007 Solution View → 50

Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?

NEET 2007 Solution View → 51

Which of the following statement, about the advantage of roasting of sulphide ore before reduction is not true?

NEET 2007 Solution View → 52

Which of the following is a carbonate ore?

AIIMS 2005 Solution View → 53

Assertion : Extraction of iron metal from iron oxide ore is carried out by heating with coke. Reason : The reaction Fe ₂ O _ 3(s) Fe _ (s) +3 / 2 O _ 2( ~g ) is a spontaneous proce

AIIMS 2005 Solution View → 54

Bauxite is an ore of

JIPMER 2004 Solution View → 55

In the extraction of copper from sulphide ore the metal is formed by reduction of Cu ₂ O with

AIIMS 2003 Solution View → 56

The compound used for gravimetric estimation of copper(II) is

AIIMS 2003 Solution View → 57

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

NEET 2003 Solution View → 58

Which of the following is not an ore of iron?

AIIMS 2002 Solution View → 59

Thermite is a mixture of iron oxide and

AIIMS 2002 Solution View → 60

What is added to the suspension of powdered ore and water in the froth flotation method?

NEET Solution View → 61

Why are oxide ores preferred for extracting iron?

NEET Solution View → 62

What term describes undesired materials present in an ore?

NEET Solution View → 63

What occurs to the mineral and gangue particles in the Froth Floatation method concerning their wetting properties?

NEET Solution View → 64

What is the final step in the process of obtaining pure metal from its ore?

NEET Solution View → 65

What is the role of a reducing agent in the reduction process?

NEET Solution View → 66

What happens to nickel tetracarbonyl at higher temperatures in the Mond Process?

NEET Solution View → 67

Which compound forms the basis for many gemstones like rubies and sapphires?

NEET Solution View → 68

How is the concentration of alumina (Al 2 O 3 ) carried out from bauxite in the leaching process?

NEET Solution View → 69

What elements are found in the anode mud obtained during copper refining?

NEET Solution View → 70

How is the separation achieved in the liquation method?

NEET Solution View → 71

What happens to the sodium aluminate after passing CO 2 gas during leaching?

NEET Solution View → 72

What is the primary purpose of liquation?

NEET Solution View → 73

What is the purpose of distillation in metal extraction?

NEET Solution View → 74

What is the primary constituent of the product known as copper matte?

NEET Solution View → 75

What are the two major steps involved in isolating metals from concentrated ore?

NEET Solution View → 76

What results from the action of the rotating paddle in the Froth Floatation method?

NEET Solution View → 77

What metals can the van Arkel method effectively refine by removing oxygen and nitrogen impurities?

NEET Solution View → 78

What solution is used in the leaching process for silver and gold?

NEET Solution View → 79

What is the result of roasting Cu 2 S?

NEET Solution View → 80

What is the role of froth stabilisers in the froth flotation method?

NEET Solution View → 81

What step involves removing undesired materials from an ore to increase the proportion of the desired substance?

NEET Solution View → 82

What method involves heating the ore in the presence of air below the metal's melting point?

NEET Solution View → 83

What is the purpose of using the froth flotation method?

NEET Solution View → 84

What reaction leads to the formation of metal compounds in the leaching process?

NEET Solution View → 85

In the electrolytic refining process, what serves as the anode?

NEET Solution View → 86

What is the product formed when lead sulphide undergoes roasting?

NEET Solution View → 87

What role does coke play in the extraction of copper from its oxide?

NEET Solution View → 88

How is pure metal obtained in zone refining?

NEET Solution View → 89

What is the final product of the reduction of iron oxides in the lower temperature range?

NEET Solution View → 90

What substance is produced when oxygen reacts with carbon at the anode during aluminium extraction ?

NEET Solution View → 91

Which ore is primarily associated with the extraction of alumina using the leaching process?

NEET Solution View → 92

What kind of furnace is used to heat sulphide ores of copper?

NEET Solution View → 93

At what temperature range does the reduction of Fe 2 O 3 to Fe 3 O 4 occur in the Blast furnace?

NEET Solution View → 94

What is done with the powdered ore in the froth flotation process?

NEET Solution View → 95

Which compound leads to the formation of blister copper?

NEET Solution View → 96

What process is used to produce cast iron?

NEET Solution View → 97

Which gas is cited as a potential pollutant in the extraction of iron from pyrites?

NEET Solution View → 98

What specific compound is extracted as a result of the leaching process from bauxite using NaOH?

NEET Solution View → 99

What is the general formula for the reduction process of metal oxide with carbon?

NEET Solution View → 100

What substance is used as the anode in the electrolysis of aluminium?

NEET Solution View → 101

What process is applied to oxide ores of iron to remove water and decompose carbonates?

NEET Solution View → 102

What are collectors used for in the froth flotation process?

NEET Solution View → 103

Where do the less basic metals go during electrolytic refining?

NEET Solution View → 104

What is the basis of hydraulic washing for separating ore and gangue particles?

NEET Solution View → 105

What reaction occurs at the cathode during the electrolysis of the molten mass in the aluminium extraction process?

NEET Solution View → 106

What is mixed with limestone and coke before being fed into the Blast furnace?

NEET Solution View → 107

Which element or compound is involved in the reduction of Cu2+(aq) to metallic copper during extraction?

NEET Solution View → 108

At what temperature is the tungsten filament heated during the van Arkel process?

NEET Solution View → 109

What impurities are typically found in bauxite ore?

NEET Solution View → 110

What happens at the cathode during copper refining?

NEET Solution View → 111

What material are the anodes made of in the copper refining process?

NEET Solution View → 112

What is involved in reducing metal oxides to metals?

NEET Solution View → 113

What technique is employed to selectively prevent ZnS from coming to the froth in the Froth Floatation method?

NEET Solution View → 114

Which metal might also undergo refining in a similar manner as copper?

NEET Solution View → 115

What is the process used to prepare wrought iron from cast iron?

NEET Solution View → 116

What kind of metals are produced using zone refining?

NEET Solution View → 117

What is the electrolyte used in the electrolytic refining of copper?

NEET Solution View → 118

How are two sulphide ores sometimes separated in the Froth Floatation method?

NEET Solution View → 119

What type of vessel acts as the cathode in the electrolysis process for aluminium extraction?

NEET Solution View → 120

How is copper typically extracted from low-grade ores in hydrometallurgy?

NEET Solution View →
Practice all General Principles and Processes of Isolation of Metals questions in the app →