InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The function of potassium ethyl xanthate in frotht floatatation process is to make the oreA. Attracted towards waterB. Water repellantC. LighterD. Heavier |
| Answer» Correct Answer - B | |
| 52. |
Cyanide process is used in the extraction ofA. AuB. AgC. Both (a) and (b)D. Cu |
| Answer» Correct Answer - C | |
| 53. |
Complex is formed in the extraction ofA. NaB. CuC. AgD. Fe |
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Answer» Correct Answer - C Hydrometallurgy `Ag_(2)S+4NaCNto2Na[Ag(CN)_(2)]+NaS` `2Na[Ag(CN)_(2)]+Zn to Na_(2)[ Zn(CN)_(4)]+2Ag` |
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| 54. |
Reverberatory furnace is epmloyed in the metallurgincal process mainly forA. Reduction of oxide oresB. Smelting of sulphide oresC. Conversion of chloriode to sulphateD. Getting magnetic materials |
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Answer» Correct Answer - A It is used for smelting (reduction) of oxide and for roasting of sulphide ores. |
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| 55. |
The purpose of smelting an ore isA. To oxidise itB. To reduce itC. To remove vapourisable impuritiesD. To obtain an alloy |
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Answer» Correct Answer - B Smelting is a process of reducing metal oxide to metal by mean of coke or CO `Fe_(2)O_(3)+3Cto 2Fe+3CO` `Fe_(2)O_(3)+3COto 2Fe+3CO` |
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| 56. |
Gravity seperation process may be used for the concentration ofA. CalamineB. HaematiteC. ChalcopyritesD. Bauxite |
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Answer» Correct Answer - B Here only Galena is PbS (a sulphide ore). Cassiterite is `SnO_(2)` (oxide ore). Magnetite is `Fe_(3)O_(4)` (Oxide ore) and Malachite is `Cu(OH)_(2).CuCO_(3)` (Carbonate iore). The fourth floatation process is used to concentrate sulphide ores, based on preferential wetting properties with frothing agent and water. |
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| 57. |
Which of the following metal is sometimes found native in natureA. AlB. CuC. FeD. Mg |
| Answer» Correct Answer - B | |
| 58. |
A metal which is refined by poling isA. SodiumB. Blister copperC. ZincD. Silver |
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Answer» Correct Answer - B Poling is useed for purification of metal contian own axide as impurity ` e.g. Cu_(2)O` in Cu, `SnO_(2)` in Sn. |
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| 59. |
(iv) Metallurgy is the process of :A. Concentraing the oreB. Roasting the oreC. Extracting the metal from the oreD. Adding carbon to the ore in blast furnace |
| Answer» Correct Answer - C | |
| 60. |
What is believed to be the second most common element in the universeA. HeliumB. HydrogenC. NitrogenD. Silicon |
| Answer» Correct Answer - D | |
| 61. |
The higest quantity present in the atmosphere is ofA. OxygenB. HydrogenC. NitrogenD. Ozone |
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Answer» Correct Answer - C `N_(2)=788%, O_(2)=21%` |
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| 62. |
Which one of the following is the most aboudant element in the universeA. NitrogenB. HydrogenC. OxygenD. Silicon |
| Answer» Correct Answer - B | |
| 63. |
Which method of purification is represented by the following equations `Ti +2I_(2) overset(523K)rarr TiI_(4) overset(1700K)rarr Ti +2I_(2)`A. CupellationB. PolingC. Van ArkelD. Lime stone |
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Answer» Correct Answer - C Van Arkel method ti and zn are refined by this method. It is used for obtaining ultra pure metals. |
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| 64. |
In electrolytic refining the impure metal is used to makeA. CathodeB. AnodeC. Electrolytic bathD. None of these |
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Answer» Correct Answer - B Improve metal as anode and pure metal as cathod. |
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| 65. |
Which of the following statement is incorrectA. Silver glance mainly contains silver sulphideB. Gold is found in native stateC. Zinc blende mainly contain zinc chlorideD. Copper pyrites also contain `Fe_(2)S_(3)` |
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Answer» Correct Answer - C Zince blende is `ZnS not ZnCl_(2)` |
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| 66. |
Which of the following is magnetite ?A. `Fe_(2)O_(3)`B. `FeS_(2)`C. `FeCO_(3)`D. `Fe_(3)O_(4)` |
| Answer» Correct Answer - D | |
| 67. |
Assertion : Gold is recoverd from its solution containing aurocyanide complex its solution containing. Reason : Zinc is more electropositive htan gold.A. If both assertion and reason are true and the reason is not the correct explanation of the assertionB. If both assertion and reason are true but and reason is the correct explanation of the assertionC. If assertion is true but reason is false.D. If the assertion and reason both are false |
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Answer» Correct Answer - A Au is rconverved from the solution by the addtion of electrophpositive metal. `2NaAu(Cu)_(2)+Zntounderset("Soluble complex")(Na_(2)Zn(Cn)_(4))+2Audarr` |
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| 68. |
Silver obtained from argentiferrous lead containing lead impurity is purified byA. DistillationB. Froth floatationC. CupellationD. Treatment of KCN |
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Answer» Correct Answer - C Cupellation : If metal possess the impurity o another metal whihh forms volatile oxide. Then cupellation method is used. |
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| 69. |
The ore chromite isA. `FeCr_(2)O_(4)`B. `CoCr_(2)O_(3)`C. `CrFe_(2)O_(4)`D. `Fe Cr_(2)O_(3)` |
| Answer» Correct Answer - A | |
| 70. |
Among the following statements, the incorrect one is `:`A. Calamine and siderite are carbonatesB. Argentite and cuprite are oxidesC. Zinc blende and pyrites are sulphidesD. Malachite and azurite are ores of copper |
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Answer» Correct Answer - B Argentite is a sulphide ore.tle FeO is first oxidised to `Fe_(2)O_(3)` and then reduced to Fe by CO. |
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| 71. |
Which one is malachite from the followingA. `Cu_(2)S`B. `CuCO_(3).Cu(OH)_(2)`C. `Cu_(2)O`D. `CuCO_(3)` |
| Answer» Correct Answer - B | |
| 72. |
Tintanium containing miniral found in our country isA. BauxiteB. DolomiteC. ChalcopyritesD. Elmanite |
| Answer» Correct Answer - D | |
| 73. |
Which is not a mineral of aluminiumA. AnhyderiteB. BauxiteC. CorundumD. Diaspore |
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Answer» Correct Answer - A Bauxite `(Al_(2)O_(3),2H_(2)O)` Crundum `(Al_(2)O_(3))` Diaspore `(Al_(2)O_(3).H_(2)O))` |
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| 74. |
Which of the following is not present in mineralA. `KNO_(3)`B. `CaCO_(3)`C. NaClD. CaO |
| Answer» Correct Answer - A | |
| 75. |
Which of the following mineral does not contain Al?A. CryoliteB. MicaC. FeldesparD. Fluorspar |
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Answer» Correct Answer - D Fluorspar `(CaF_(2))`, Cryolite `(Na_(3)AlF_(6))`, Feldspar `(KAlSi_(3)O_(8))`, Mica `(K_(2)O.3Al_(2)O_(3) 6SiO_(2).2H_(2)O)` |
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| 76. |
Sapphrie in mineral ofA. CuB. ZnC. AlD. Mg |
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Answer» Correct Answer - C Saphire (Blue colour ) is mneral of Al. |
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| 77. |
Composition ofAzurite mineral ofA. `CuCO_(3)CuO`B. `Cu(HCO_(3)). Cu(OH)_(2)`C. `2CuCO_(3). Cu(OH)_(2)`D. `CuCO_(3).2Cu(OH)_(2)` |
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Answer» Correct Answer - C Azurite is a basic carbonate ore of copper, `2CuCO_(3).Cu(OH)_(2)` |
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| 78. |
The ore carnallite is represented by structure:A. `Na_(2)Al_(2)O_(3)`B. `Na_(3)AlF_(6)`C. `KCl.MgCl_(2)6H_(2)O`D. `Fe_(3)O_(4)` |
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Answer» Correct Answer - C Carnalite is an important ore of magnesium. It is `KCl.MgCl_(2).6H_(2)O` |
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| 79. |
Bauxite ore is concentrated byA. Froth floatationB. Electromagnetic separationC. Chemical separationD. Hydruali separation |
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Answer» Correct Answer - C Chemical separation of Leaching. In this powdered ore is treated with a suitable reagent which can dissolve th ore but not impurities. |
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| 80. |
The metallic luster exhibited by sodium is explained byA. Diffusion of sodium ionsB. Oscillations of loose electronsC. Excitation of free protonD. Exsitence of body centered cubic lattice |
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Answer» Correct Answer - B Oscillation of loose electons. |
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| 81. |
Which of the following ore does not represent the ore of iron?A. HaematiteB. MagnetiteC. CassiteriteD. Limonite |
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Answer» Correct Answer - C Cossiterite `(SnO_(2))`, Magnetic `(Fe_(3)O_(4))` Haematite `(Fe(2)O_(3))` , Limonite `(Fe_(2)O_(3).3H_(2)O)` |
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| 82. |
In a lime kiln, to get higher yield of `CO_(2)` the measure that can be taken is `:`A. To remove CaOB. To add more `CaCO_(3)`C. To maintain high temperatureD. To pump out `CO_(2)` |
| Answer» Correct Answer - A | |
| 83. |
The most abundant element in the earth crust isA. HydrogenB. OxygenC. SiliconD. Carbon |
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Answer» Correct Answer - B `{:("Element",% "abudance by weight"),(O,46.6),(Si,27.7),(Al,8.3),(Fe,5.1),(Ca,3.6):}` |
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| 84. |
Ore of which of the following element is a metalloid?A. AsB. NaC. AuD. Fe |
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Answer» Correct Answer - A As `to` Metalloid Na, Au, Fe `to` Metals. |
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| 85. |
Cinnabar is an ore ofA. HgB. CuC. PbD. Zn |
| Answer» Correct Answer - A | |
| 86. |
Which one of the following is an ore of silver?A. ArgentiteB. StibniteC. HaematiteD. Bauxite |
| Answer» Correct Answer - A | |
| 87. |
Calamine isA. `ZnSO_(4)`B. ZnOC. `Zn(NO_(3)_(2)`D. `ZnCO_(3)` |
| Answer» Correct Answer - D | |
| 88. |
Copper pyrites are concentrated byA. Electromagnetic methodB. Gravity methodC. Froth floatation processD. All the above methods |
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Answer» Correct Answer - C Sulphides ores are always concentrated by fourth floatation process. |
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| 89. |
Cassiterite is concentrated byA. LevigationB. Electromagnetic separationC. FloatationD. Liquifaction |
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Answer» Correct Answer - B Cassiterite `SnO_(2)` or tinstone- as ore of tin being non-magnetic can eb separated from magnetic impurities like Fe and Mn from this method. |
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| 90. |
Which one of the following is not a sulphide oreA. MagnetiteB. Iorn pyritesC. Copper glanceD. Sphalerite |
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Answer» Correct Answer - A `{:("Magnetite",Fe_(3)O_(4)),("Iron pyrites",FeS_(2)),("Copper glance",Cu_(2)S),("Sphalrite", "Sulphife of" ZnFe):}` |
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| 91. |
Which of the following is not an ore of IronA. MagnetiteB. SideriteC. SmithsoniteD. Limonite |
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Answer» Correct Answer - C Magnetite `(Fe_(3)O_(4))` Siderite `(FeCO_(3))`, Limonite `(Fe_(2)O_(3))` are ore of Iron. Only Smithsonit is not an are of Iron. |
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| 92. |
In the correct of the Hall-Heroult process for the extraction of `Al`, which of the following statements is false ?A. `COandCO_(2)` are produced in this proessB. `Al_(2)O_(3)` is mixture and bring conductivityC. `Al^(3+)` is reduced at the cothode to from alD. `Na_(3)AlF_(6)` serves as the electrolyte |
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Answer» Correct Answer - D `Al_(2)O_(3)` is the electrolyte, which is undergoin the redox process, So, `Al_(2)O_(3)` serves as electrolyte and `Na_(3)AlF_(6)`, although an electrolyte, serves as solvent. Rest all are true. |
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| 93. |
Alumininum is prepared in large quantities byA. Heating cryolite in alimited equantity of airB. Reducing alumininum oxide with cokeC. Reducing aluminium oxide with sodiumD. Electrolysing alumininum oxide dissolved in fused electrolyte |
| Answer» Correct Answer - D | |