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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.
| 1. |
The mineral carnallite contains (i)("__________"") and (ii)("__________"") metals.(iii)("__________"") is purified by cupellation and (iv)("__________"") is purified by distillation .A. `{:("(i)","(ii)","(iii)","(iv)"),("calcium","zinc","mercury","tin"):}`B. `{:("(i)","(ii)","(iii)","(iv)"),("calcium","magnesium","zinc","lead"):}`C. `{:("(i)","(ii)","(iii)","(iv)"),("potassium","calcium","copper","mercury"):}`D. `{:("(i)","(ii)","(iii)","(iv)"),("magnesium","potassium","silver","mercury"):}` |
| Answer» Correct Answer - D | |
| 2. |
In the extraction of chlorine by electrolysis of brine_________.A. oxidation of `Cl^(-)` ion to chlorine gas occursB. reduction of `Cl^(-)` ion to chlorine gas occursC. for overall reaction `DeltaG^(@)` has negative valueD. a displacement reaction takes place |
| Answer» Correct Answer - A | |
| 3. |
Match the column I with Column II and mark the appropriate choice. A. `(A) to (i) , (B) to (ii), (C) to (iii) , (D) to (iv)`B. `(A) to (iii) , (B) to (i), (C) to (ii) , (D) to (iv)`C. `(A) to (ii) , (B) to (iv), (C) to (i) , (D) to (iii)`D. `(A) to (iv) , (B) to (iii), (C) to (i) , (D) to (ii)` |
| Answer» Correct Answer - C | |
| 4. |
Match the column I with Column II and mark the appropriate choice. A. `(A) to (iv) , (B) to (iii), (C) to (ii) , (D) to (i)`B. `(A) to (iii) , (B) to (ii), (C) to (i) , (D) to (iv)`C. `(A) to (ii) , (B) to (i), (C) to (iii) , (D) to (iv)`D. `(A) to (i) , (B) to (ii), (C) to (iii) , (D) to (iv)` |
| Answer» Correct Answer - A | |
| 5. |
Match the column I with Column II and mark the appropriate choice. A. `(A) to (iv) , (B) to (iii), (C) to (i) , (D) to (ii)`B. `(A) to (i) , (B) to (ii), (C) to (iv) , (D) to (iii)`C. `(A) to (i) , (B) to (ii), (C) to (iv) , (D) to (iii)`D. `(A) to (iii) , (B) to (iv), (C) to (i) , (D) to (ii)` |
| Answer» Correct Answer - B | |
| 6. |
Match the column I with Column II and mark the appropriate choice. A. `(A) to (i) , (B) to (iii), (C) to (ii) , (D) to (iv)`B. `(A) to (iii) , (B) to (iv), (C) to (ii) , (D) to (i)`C. `(A) to (ii) , (B) to (ii), (C) to (iii) , (D) to (i)`D. `(A) to (ii) , (B) to (i), (C) to (iv) , (D) to (iii)` |
| Answer» Correct Answer - D | |
| 7. |
Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic .A. `CaCO_(3) to CaO + CO_(2)`B. `2C+O_(2)to 2CO`C. `C+O_(2) to CO_(2)`D. `Fe_(2)O_(3) + 3CO to 2Fe+3CO_(2)` |
| Answer» Correct Answer - A | |
| 8. |
At `1000^(@)C`, `Zn_((s)) +(1)/(2)O_(2(g)) to ZnO_((s)), DeltaG^(@)=-360 KJ "mol"^(-1)` `C_((s)) + (1)/(2)O_(2(g)) to CO_((g)),DeltaG^(@) =-460 KJ "mol"^(-1)` The correct statement isA. zinc can be oxidised by carbon monoxideB. zince blend is produced during the reactionC. zinc oxide can be reduced by graphiteD. zinc can be oxidised by graphite |
| Answer» Correct Answer - C | |
| 9. |
Match the column I with Column II and mark the appropriate choice. A. `(A) to (i), (B) to (ii), (C) to (iii), (D) to (iv)`B. `(A) to (ii), (B) to (iii), (C) to (iv), (D) to (i)`C. `(A) to (iv), (B) to (iii), (C) to (ii), (D) to (i)`D. `(A) to (iii), (B) to (i), (C) to (iv), (D) to (ii)` |
| Answer» Correct Answer - D | |
| 10. |
Name the four man zones of blast furnace in the extraction of `Fe` from `Fe_(2)O_(3)`. |
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Answer» Zone in blast furnace : `(i)` Zone of combustion `(ii)` Zone of heat absorbtion `(iii)` Zone of reduction `(iv)` Zone of slag formation |
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| 11. |
Given below are the different temperature reactions and products during extraction of iron in blast furnace. P. 900 K `" "1. " "Fe_(2)O_(3) + 3C to 2Fe + 3CO` Q. 1200 K `" "2." "CaCO_(3) to CaO + CO_(2)` R. 1500 K `" "3." " 2C + O_(2) to 2CO` S. 2000 K `" "4. " "Fe_(2)O_(3) +3CO to 2Fe+ 3CO_(2)` Find the correct match.A. P-4,Q-2,R-3,S-1B. P-4,Q-3,R-2,S-1C. P-3,Q-4,R-1,S-2D. P-4,Q-2,R-1,S-3 |
| Answer» Correct Answer - D | |
| 12. |
Roasting of ores is done inA. to burn off sulphur, arsenic , antimony etc. as oxides and convert all the iron and copper to their oxidesB. to burn off arsenic, antimony etc. as oxides and burn off sulphur so that enough of it remains to combine with all the copper.C. to burn off sulphur partially, in order to leave enough of sulphur to combine with arsenic, antimony etc. and to convert all the rion ad copper to oxides.D. to melt arsenic and antimony sulphides etc. and remove them by liquation and to burn off sulpur partially to leave enough to combine with copper and iron. |
| Answer» Correct Answer - C | |
| 13. |
Direct reduction of `Fe_(2)O_(3)` by Carbon is possible at temperature.A. less than 1123 KB. equal to or less than 1123 KC. more than 1123 KD. equal to or more than 1123 K. |
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Answer» Correct Answer - B |
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| 14. |
In roasting the ores are generally converted intoA. Metal oxidesB. Hydrated metal oxidesC. MetalsD. None of these |
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Answer» Correct Answer - A Roasting converts the ores into metal oxides. |
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| 15. |
Which of the following statements is correct regarding the slag obtained during the extraction of a metal like copper or iron ?A. The slag is lighter and has lower metling point than the metal.B. The slag is heavier and has lower melting point than the metal.C. The slag is lighter and has higher melting point than the metal.D. The slag is heavier and has higher melting point than the metal. |
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Answer» Correct Answer - A Slag is lighter and has lower melting point than the metal. |
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| 16. |
Which of the following statements is correct regrading the slag obtained during the extraction of a metal like copper or iron?A. The slag is lighter and has lower melting point than the metal.B. The slag is heavier and has lower melting point than the metalC. The slag is lighter and has higher melting point than the metalD. The slag is heavier and has higher melting point than the metal. |
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Answer» Correct Answer - (A) |
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| 17. |
Sulphide ores are generally concentrated byA. Froth floatationB. RoastingC. Magnetic seperationD. Carbon reduction. |
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Answer» Correct Answer - A Sulphide ores are generally concentrated by froth-floatation process. |
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| 18. |
Elements of group 1 generally form chloride ores. The only other element which form chloride ores isA. CuB. AgC. PbD. Hg |
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Answer» Correct Answer - B |
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| 19. |
Which of the following are contains copper and iron ?A. SideriteB. Copper pyritesC. Iron pyirtesD. Chalcocite |
| Answer» Correct Answer - B | |
| 20. |
Match the following from column `I` to column `II` `{:("Column I" , "Column II"),("Malachite",Fe),("Sphalerite",Ag),("Horn silver", Zn),("Chromine",Cu):}` |
| Answer» Please, refer to text article. | |
| 21. |
Zincite is ___________A. ZnOB. `ZnCO_(3)`C. `ZnSO_(4)`D. ZnS |
| Answer» Correct Answer - A | |
| 22. |
Which of the following is a carbonate ore?A. SideriteB. AluminaC. CalamineD. Malachite |
| Answer» Correct Answer - D | |
| 23. |
Malachite is an ore ofA. IronB. ZincC. CopperD. Mercury |
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Answer» Correct Answer - C Malachite is an ore of copper. |
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| 24. |
(1) Kaolinite is an ore of Al. (2) Sphalerite is an ore of sulphide of Cu. (3) Malachite is an oxide ore of copper (4) Sphalerite is an iron carbonate.A. TETTB. TTFTC. TFFTD. TFFF |
| Answer» Correct Answer - C | |
| 25. |
Malachite is basic copper carbonate. The only other elelment forming basic carbonate ore isA. BiB. BaC. MnD. Mo |
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Answer» Correct Answer - B |
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| 26. |
Malachite ore isA. `CuO * CuCO_(3)`B. `CuCO_(3) *Cu(OH)_(2)`C. `CuO* Cu(OH)_(2)`D. `Cu_(2)O * Cu(OH)_(2)` |
| Answer» Correct Answer - B | |
| 27. |
Which reducing agent is commonly employed for reduction of `(a) ZnO "to" Zn` `(b) Cr_(2)O_(3) "to" Cr` `(c ) TiCl_(4) "to" Ti` |
| Answer» `(a)` Coke `(b) Al` `(c ) Mg` | |
| 28. |
The reducing agent used in thermite process isA. MagnesiumB. ChromiumC. AlluminiumD. Iron |
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Answer» Correct Answer - C In the thermite process, the reducing agent used is aluminium . Hydro metallurgy. |
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| 29. |
In the thermite process, _____is used as a reducting agent.A. ZnB. AlC. MnD. Fe |
| Answer» Correct Answer - B | |
| 30. |
Which of the following statements is correct about the role of substances addedd in the froth floatation process?A. Collectors enhance the non-wettability of ore particles.B. Collectors enhance the wettability of gangue particules.C. Collectors help in separating two sulphide ores present in the mixture.D. Collectors helps ore particles to settle down below the froth . |
| Answer» Correct Answer - A | |
| 31. |
Which method of purification is represented by the following equation `Ti(g) +2I_(2)(g) overset(523K)to Til_(4)(g) overset(1700K)to Ti(s) + 2I_(2)(g)`A. CupellationB. PolingC. Van ArkelD. zone refining. |
| Answer» Correct Answer - C | |
| 32. |
Identify the alloy containing a non metal as a constitunt in itA. InvarB. SteelC. Bell MetalD. Bronze |
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Answer» Correct Answer - B Steel contain the non metal carbon |
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| 33. |
the carbon based reduction method is not used for extraction ofA. tin from tin stoneB. iron from `Fe_(2)O_3`C. aluminium from aluminaD. magnesium from `MgCO_3.CaCO_3` |
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Answer» Correct Answer - C Highly electropositive metals like Al and Mg are not obtained of reduction of their oxides with carbon because they form their corresponding carbines. Instead they are obtained by electrolytic reduction of their fused salts, i.e., Al from `Al_(2)O_(3) ` and Mg from `MgCl_(2)` |
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| 34. |
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide withA. Copper (I) sulphideB. Sulphur dioxide (`SO_2`)C. Iron sulphide (FeS)D. Carbon monoxide (CO). |
| Answer» Correct Answer - A | |
| 35. |
The carbon-based reduction method is not used in the extraction ofA. tin from `SnO_2`B. iron from `Fe_(2)O_(3)`C. aluminium from aluminimumD. magnesium from `MgCO_(3).CaCO_(3)` |
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Answer» Correct Answer - C::D `H_(2)` cannot be used for the reduction of heated `Al_(2)O_(3)` |
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| 36. |
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide withA. Sulphur dioxide (`SO_2`)B. Iron sulphide (FeS)C. Carbon monoxide (CO)D. Copper(I) sulphide (`Cu_(2)S`). |
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Answer» Correct Answer - C In the extraction of copper from its sulphide ore, when ore is subjected to roasting , some of it is oxidised to `Cu_(2)O` which reacts with the remaining `Cu_(2)S` (sulphide ore ) to give copper metal. `Cu_(2)S` + `2Cu_(2)O` `rarr` 6Cu + `SO_2` uarr` Here `Cu_(2)S` behave as reducing agent. |
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| 37. |
Auto reduction is employed in the metallurgy ofA. AgB. AlC. TiD. Zn |
| Answer» Correct Answer - A | |
| 38. |
Auto-reduction process is used for the extraction of :A. HgB. FeC. CuD. Pb |
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Answer» Correct Answer - A::C::D Auto reduction process is used for the extraction of Hg, Cu and Pb |
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| 39. |
The auto reduction process is not used in the metallurgy ofA. HgB. CuC. PbD. Fe |
| Answer» Correct Answer - D | |
| 40. |
When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed . FeO is present as impurities . This can be removed as slag during reduction of CuO . The flux added to form slag isA. `SiO_2` which is an acid fluxB. Lime stone which is a basic fluxC. `SiO_2` which is acidic fluxD. CaO which is basic flux. |
| Answer» Correct Answer - A | |
| 41. |
Bauxite ore is made up of `Al_(2)O_3` + `SiO_2` + `TiO_2` + `Fe_(2)O_3` . This ore is treated with conc. NaOH solution at 500 K and 35 bar pressure for a few hours and filtered hot. In the filtrate the species present are :A. `NaAl(OH)_4` onlyB. `Na_(2)Ti(OH)_6` onlyC. `NaAl(OH)_4 and Na_(2)SiO_3` bothD. `Na_(2)SiO_3` only . |
| Answer» Correct Answer - C | |
| 42. |
Bauxite is made up of `Al_(2)O_3` + `SiO_2` + `TiO_2` + `Fe_(2)O_3` . This ore is treated with conc. NaOH solution at 500 K and 35 bar pressure for a few hours and filtered hot. In the filtrate the species present areA. `NaAl(OH)_4` onlyB. `Na_(2)Ti(OH)_6` onlyC. `NaAl(OH)_4 and Na_(2)SiO_3` bothD. `Na_(2)SiO_3` only . |
| Answer» Correct Answer - C | |
| 43. |
The chemical formula of bauxite isA. `Al_(2)O_(3)`B. `Al_(2)Cl_(6)`C. `Al_(2)O_(3) *2H_(2)O`D. `Al_(2)CO_(3)*4H_(2)O` |
| Answer» Correct Answer - C | |
| 44. |
Electrolytic reduction method is used fro the extraction ofA. highly electro positive elementsB. highly electro negative elementsC. transition metalsD. noble metals |
| Answer» Correct Answer - A | |
| 45. |
During electrolytic refining of copper, some metals present as impurity settle as anode mud. These areA. Sn and AgB. Pb and ZnC. Ag and AuD. Fe and Ni |
| Answer» Correct Answer - A | |
| 46. |
Which of the following metals is obtained by electrolytic reduction process ?A. FeB. CuC. AgD. Al |
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Answer» Correct Answer - D Al is obtained by electolytic reduction process. |
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| 47. |
Electrolytic reduction method is used fro the extraction ofA. highly electromagnetic elementsB. highly electropositive elementsC. transition metalsD. noble metals |
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Answer» Correct Answer - B Electrolytic reductiion method is used in the extraction of highly electropositive elements. |
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| 48. |
Which of the following metals cannot be extracted by smelting process ?A. PbB. FeC. ZnD. Al. |
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Answer» Correct Answer - D Aluminium because it has more affinity for oxygen than carbon. |
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| 49. |
Which of the following metals are extracted by electrolytic reduction?A. FeB. CuC. AgD. Al |
| Answer» Correct Answer - D | |
| 50. |
Which of the following metals is extracted using silica lined convertor ?A. MgB. AlC. CuD. Zn |
| Answer» Correct Answer - C | |