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.
| 1. |
Bessemer converter is used for Atomic nos, `Mn = 25, Fe = 26, Co = 27, Ni = 28`A. Pig ironB. SteelC. Wrought ironD. Cast iron |
| Answer» Correct Answer - B | |
| 2. |
Electrolytic reduction method is used fro the extraction ofA. Highly electronegative elementB. Transition metalC. MetalloidsD. Highly electropositive element |
| Answer» Correct Answer - D | |
| 3. |
The chemical formula of diaspore an ore of alumium isA. `Al_(2)O_(3).H_(2)O`B. `Al_(2)O_(3)`C. `Al_(2)O_(3).2H_(2)O`D. `Al(OH)_(3)` |
| Answer» Correct Answer - A | |
| 4. |
Extraction of zinc from zinc blende is achieved by:A. electrolytic reductionB. roasting following by reduction with carbonC. roasting followed by reduction with another metalD. roasting followed by self-reduction |
| Answer» Correct Answer - B | |
| 5. |
Two prevent corrosion iron pipes carrying drinking water are coated with zinc. The process involved isA. Alloy formationB. ElectroplatingC. GalvanisingD. Soldering |
| Answer» Correct Answer - C | |
| 6. |
Blister copper is:A. Pure copperB. Copper containing 2% impurityC. Alloy of copperD. None |
| Answer» Correct Answer - B | |
| 7. |
Spelter isA. Impure CuB. Impure ZnC. ZnOD. CuO |
| Answer» Correct Answer - B | |
| 8. |
Red how steel rod on suddenly immersing in water becomesA. Soft and malleableB. Hard and brittleC. Tough and ductileD. Fibrous |
| Answer» Correct Answer - B | |
| 9. |
Which statement about corrosive sublimate is incorrect ?A. It is prepared by heating mercury and chlorineB. It reduce stannic chlorideC. It oxidises stannous chlorideD. It sublimes readily |
| Answer» Correct Answer - B | |
| 10. |
Polling process us used in the purification ofA. GeB. BiC. CuD. Fe |
| Answer» Correct Answer - C | |
| 11. |
Copper matte consists of:-A. `FeSiO_(2)`B. `SiO_(2) + FeS`C. `FeS + Cu_(2)S`D. `CuS + SiO_(2) + FeO` |
| Answer» Correct Answer - C | |
| 12. |
Heating mixture of `Cu_(2)O` and `Cu_(2)S` will giveA. `Cu_(2)SO_(3)`B. `CuO + CuS`C. `Cu + SO_(3)`D. `Cu + SO_(2)` |
| Answer» Correct Answer - D | |
| 13. |
In blast furnace, the highest temperature is inA. Blast furnaceB. reverberatory furnaceC. Electrical furnaceD. Muffle furnace |
| Answer» Correct Answer - C | |
| 14. |
Heating pyrites to remove sulphur is calledA. roastingB. CalcinationC. SmeltingD. Fluxing |
| Answer» Correct Answer - A | |
| 15. |
Zone refining is a method to obtainA. Very high temperatureB. Ultrapure AlC. Ultrapure metalsD. Ultrapure oxide |
| Answer» Correct Answer - C | |
| 16. |
Themite is the mixture ofA. `Cr_(2)O_(3) + Al`B. `Cu + Mg`C. `Zn + Mg`D. `Fe + Al` |
| Answer» Correct Answer - A | |
| 17. |
Pig iron is converted into strrl by decreasing the amount of carbon present in it in aA. Blast furnaceB. Pyrite burnerC. Bessemer converterD. None of these |
| Answer» Correct Answer - C | |
| 18. |
Roasting is used during metallurgical operation usingA. GalenaB. Iron pyritesC. Copper glanceD. All |
| Answer» Correct Answer - D | |
| 19. |
The main function of roasting isA. To remove the volatile impuritiesB. OxidationC. ReductionD. to make slag |
| Answer» Correct Answer - D | |
| 20. |
In blast furnace, iron oxide is reduced byA. COB. CC. `SiO_(2)`D. `CaCO_(3)` |
| Answer» Correct Answer - A | |
| 21. |
At what temperature carbon monoxide reduces ferric oxide to Fe ?A. 900 KB. 1200 KC. 2000 KD. 500 K |
| Answer» Correct Answer - A | |
| 22. |
Copper reducesA. NaB. AlC. MgD. None |
| Answer» Correct Answer - D | |
| 23. |
High purity copper metal is obtained byA. Carbon reductionB. Hydrogen reductionC. Electrolytic methodD. Thermite process |
| Answer» Correct Answer - C | |
| 24. |
Iron is obtained on large scale from haematite `Fe_(2)O_(3)`A. By reductionB. By oxidationC. By reduction followed by oxidationD. By oxidation followed by reducting |
| Answer» Correct Answer - D | |
| 25. |
In metallurgy, flux is a substance used to convertA. Mineral into silicateB. Fusible impurities to infusible impuritiesC. Infusible impurities to soluble impuritiesD. Soluble impurities to infusible impurities |
| Answer» Correct Answer - C | |
| 26. |
The chemical formula of wallemite isA. ZnOB. `ZnCO_(3)`C. `ZN_(2)SiO_(4)`D. ZnS |
| Answer» Correct Answer - C | |
| 27. |
Which of the following benefication processes is used for the mineral `Al_(2)O_(3).2H_(2)O` ?A. Froth floatationB. LeachingC. LiquationD. Magnetic separation |
| Answer» Correct Answer - B | |
| 28. |
The formula of limonite isA. `ZnCO_(3)`B. `2Fe_(2)O_(3). 3H_(2)O`C. `CaCO_(3). MgCO_(3)`D. `CaCO_(3)` |
| Answer» Correct Answer - B | |
| 29. |
The formula of haematite isA. `Fe_(3)O_(4)`B. `Fe_(2)O_(3)`C. `FeCO_(3)`D. `FeS_(2)` |
| Answer» Correct Answer - B | |
| 30. |
Dolomite is mineral whose formula isA. `CaMg(CO_(3))_(2)`B. `MgCO_(3)`C. `CaCO_(3).MgCO_(3)`D. (a) and (c) both |
| Answer» Correct Answer - D | |
| 31. |
After partial roasting, the sulphide of copper is reduced byA. Reduction by carbonB. ElectrolysisC. Self reductionD. Cyanide process |
| Answer» Correct Answer - C | |
| 32. |
What are coinage metals ? Give example .A. normal elementsB. transition elementsC. Active elementsD. Highly electropositive element |
| Answer» Correct Answer - B | |
| 33. |
Calcium silicate (slag) formed in the slag formation zone is extraction of iron from haematite ore I. does not dissolve in molten iron II. being lighter floats on the moltern iron III. Is used in cement industry IV. prevents the re-oxidation of molten ironA. 1, 2B. 1, 3C. 1, 4D. `1, 2, 3, 4` |
| Answer» Correct Answer - D | |
| 34. |
Electrolytic reduction of alumina to aluminium by the Hall-Heroult process is carried outA. in the presence of NaClB. in the presence of fluoriteC. in the presence of cryolite which forms a melt at lower temperature and increases the electrical conductivityD. in the presence of cryolite which forms a melt at higher temperature and increases the electrical conductivity |
| Answer» Correct Answer - C | |
| 35. |
Which of the following is magnetite ?A. `Fe_(2)O_(3)`B. `MgCO_(3)`C. `Na_(2)Al_(2)O_(3)`D. `KCl. MgCl_(2). 6H_(2)O` |
| Answer» Correct Answer - A | |
| 36. |
Aluminium is extracted in the electrolysis of :A. AluminaB. BauxiteC. Molten cryoliteD. Alumina mixed with molten cryolite |
| Answer» Correct Answer - D | |
| 37. |
When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes areA. `{:("Cathode","Anode"),("Pure Copper","Pure Zinc"):}`B. `{:("Cathode","Anode"),("Pure Zinc","Pure Copper"):}`C. `{:("Cathode","Anode"),("Pure Copper","Impure Copper"):}`D. `{:("Cathode","Anode"),("Pure Zinc","Impure Zinc"):}` |
| Answer» Correct Answer - C | |
| 38. |
In electrorefining of metal the impure metal is made the anode and strip of pure metal the cathode during the electrolysis of an aqueous solution of a complex metal salt. This method cannot be used for refining ofA. SilverB. CopperC. AluminiumD. Gold |
| Answer» Correct Answer - C | |
| 39. |
In the electrolysis of alumina, cryolite is added toA. Lower the melting point of aluminaB. Increase the electrical conductivityC. Both a and bD. Remove impurities from alumina |
| Answer» Correct Answer - C | |
| 40. |
Chemical used as a depressant in separatin ZnS from PbS in froth-floatation process , isA. `Na_(2)SO_(4)`B. `NaCl`C. `NaCN`D. NaOH |
| Answer» Correct Answer - C | |
| 41. |
Which of the following processe (s) during the extraction of copper from chalcopyrites ? (1) Froth floatation (2) Roasting (3) Bassemerisation (4) LeachingA. 1, 2B. 1, 3C. `1, 2, 3`D. 3, 4 |
| Answer» Correct Answer - C | |
| 42. |
Which one of the following metals can not be obtained on electrolysis of aqueous solution of its salts?A. AgB. MgC. CuD. Au |
| Answer» Correct Answer - B | |
| 43. |
In the froth floatation process for the facilitation of ores the ore particles float becauseA. They are lightB. Their surface is not easily weted by waterC. They bear electrostatic chargesD. They are insoluble |
| Answer» Correct Answer - D | |