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Tenth Class Bit Bank Physical Science
Prepared by :- Gali Sreekar M.Sc, M.Sc, B.Ed Chirala mandal, Prakasam. 9440234404 39
13. Principles of Metallurgy
Multiple Choice Questions
1. The impurity present in the ore is called as _________ [ A ]
A) Gangue B) flux C) Slag D) Mineral
2. Which of the following is a carbonate ore? [ A ]
A) Magnesite B) Bauxite C) Gypsum D) Galena
3. Which of the following is the correct formula of Gypsum [ D ]
A) CuSO4. 2H2O B) CaSO4.½ H2O C) CuSO4.5H2O D) CaSO4. 2H2O
4. The oil used in the froth floatation process is __________ [ B ]
A) kerosene oil B) pine oil C) coconut oil D) olive oil.
5. Froth floatation is method used for the purification of ______ore. [ A ]
A) sulphide B) oxide C) carbonate D) nitrate
6. Galena is an ore of ———————— [ B ]
A) Zn B) Pb C) Hg D) Al
7. The metal that occurs in the native form is __________ [ B ]
A) Pb B) Au C) Fe D) Hg
8. The most abundant metal in the earth’s crust is —————— [ B ]
A) Silver B) Aluminium C) zinc D) iron
9. The reducing agent in thermite process is ___________ [ A ]
A) Al B) Mg C) Fe D) Si
10. The purpose of smelting an ore is to __________ it. [ B ]
A) Oxidise B) Reduce C) Neutralise D) none of these
11. The reducing agent used in thermite process is____________ [ A ]
A) Al B) Mg C) Fe D) Si
12. The purpose of smetting an ore is to ____________ it [ D ]
A) 4Oxidse B) Reduce C) Neutralise D) None
13. The dprocess used to convent sulphise ore into oxide ore is____________ [ D ]
A) Roasting B) Calcination C) Smetting D) None
14. The substance added to remove the impurity is____________ [ A ]
A) Gangue B) Flux C) Fuel D) None
15. The most abundent metal in he earth's crust is ____________ [ C ]
A) Silver B) Zinc C) Aluninium D) Iron
16. ____________group elements are called chalcogens. [ A ]
A) 16th B) 15th C) 14th D) 13th
17. Low boiling metals are purified by ____________ method. [ B ]
A) Poling B) Distillation C) Liquation D) Electro refining
18. The part of Furnace where we keep Fuel for burning is_____________ [ A ]
A) Hearth B) Fire box C) Chimney D) None
19. During corrosion ____________ process takes place. [ C ]
A) Oxidation B) Reduction C) Both D) None
20. ____________ is the place inside the furnace where the ore is kept for heating purpose. [ A ]
A) Fire box B) Hearth C) Chimney D) None

21. _____________is an alloy of copper and tin. [ A ]
A) Bronze B) Steel C) Brass D) Nickel
22. The impurities like clay in a ore is called______________ [ B ]
A) Slag B) Gangue. C) Ore D) Flux
23. _______________ process involves the reaction of metal oxides with aluminium. [ C ]
A) Roasting B) Calcination C) Thermite D) Smelting
24. The chemical formula of cinnabar is____________ [ A ]
A) HgS. B) Pbo C) Fe2O3 D) Pb(NO3)2
25. The substance added to the ore to remove gangue from it is called ______________ [ D ]
A) Slag B) Gangue C) Ore D) Flux
26.____________are a process of heating the ore strongly in the absence of air or oxygen. [ B ]
27. ___________ is a process of heating the ore strongly in a free supply of air or oxygen. [ A ]
28. A metallic compound occurring in the earth crust along with impurities is called ______[ D ]
A) Gangue B) Flux C) Fuel D) Mineral
29. A mineral from which a metal can be extracted economically and conveniently is called [ C ]
A) Gangue B) Flux C) Ore D) Mineral
30. Blister copper is purified by ______________ [ A ]
A) Poling method. B) Calcination C) Thermite D) Smelting
31. The substance added to the ore to remove gangue from it is called______________ [ A ]
A) Flux B) Gangue C) Ore D) Slag
32. Bronze is an alloy of _______________ [ D ]
A) copper and lead B) copper and Silver C) copper and gold D) copper and tin
33. The most abundant metal in earth crust is____________ [ B ]
A) Oxygen B) Aluminium C) Zinc D) Iron
34. The chemical process in which one is heated in the absence of air is called__________ [ C ]
A) Roasting B) Smelting C) Calcination D) Distillation
35. Smelting is carried out in ____________ Furnace. [ B ]
A) Reverberatory B) Blast C) Retort D) Clay
36. The impurities present in the ore is called______________ [ D ]
A) Slag B) Forth C) Flux D) Gangue
37. ____________ is a process of heating the ore strongly in the presence of oxygen. [ B ]
A) Smelting B) Roasting C) Calcination D) Distillation
38. The method suitable for purification of low boiling metals is___________________ [ B ]
A) Poling B) Distillation C) Liquation D) Electrolytic Refining
39. The oil used in the froth floatation process is__________________ [ B ]
A) Kerosene B) Pine Oil C) Coconut Oil D) Olive Oil
40. Which of the following element occurs in free state? [ D ]
A) Phosphorus B) Sulphur C) Silicon D) Gold

41. Galena is an ore of________________ [ B ]
A) Zn B) Pb C) Fe D) Al
42. The purpose of smelting an ore is to _________________ [ A ]
A) Oxidize B) Reduce C) Neutralize D) None of these
43. Forth floating is a method for the purification of _____________ ore. [ A ]
A) Sulphide B) Oxide C) Carbonate D) Nitrate
44. Roasting is carried out in ______________ Furnace. [ A ]
A) Reverberatory B) Blast C) Retort D) Clay
45. During calcinations, carbonate is converted to its ______________ [ A ]
A) Oxide B) Sulphite C) A and B D) None of these
46. Chemical formula of a Cinnabar is _____________ [ C ]
A) HgS B) AgCl C) PbS D) NaCl
47. Chemical formula of a Horn silver is _____________ [ B ]
48. Chemical formula of a Gelena is _____________ [ C ]
49. Chemical formula of a Rocksalt is _____________ [ D ]
50. How many water molecules are present in Epsom salt? [ D ]
A) 4 B) 5 C) 6 D)7

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