Description : The chemical composition of slag formed during the smelting process in the extraction of copper is :-
Last Answer : The chemical composition of slag formed during the smelting process in the extraction of copper is :- A. `Cu_(2)O+ ... C. `CuFeS_(2)` D. `Cu_(2)S+FeO`
Description : In the extraction of copper, the slag formed in the blast furnace is
Last Answer : In the extraction of copper, the slag formed in the blast furnace is A. `CaSiO_(3)` B. `FeSiO_(3)` C. `FeSiO_(3)` D. `MnSiO_(3)`
Description : Matte smelting is used in the extraction of (A) Lead (B) Zinc (C) Aluminium (D) Copper
Last Answer : Option D
Description : Flux addition during smelting of ore is done to (A) Remove impurities/gangue (B) Enhance rate of reaction (C) Accelerate reduction of ore (D) Separate slag from metal
Last Answer : (A) Remove impurities/gangue
Description : The slag formed in the blast furnace during the extraction of iron from haematite is
Last Answer : The slag formed in the blast furnace during the extraction of iron from haematite is A. `Ca_(3)(PO_(4))_(2)` ... (3)` C. `FeSiO_(3)` D. `MnSiO_(3)`
Description : Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore? (A) High fusibility & fluidity (B) High thermal conductivity (C) Low density (D) High chemical activity
Last Answer : B) High thermal conductivity
Description : 5. In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following: (A) Jet of water at high pressure (B) Blast of air (C) Mixture of water and air (D) Rain of molten lead
Description : When copper pyrites is roasted in excess of air, a mixture of `CuO + FeO` is formed. `FeO` is present as impurity. This can be removed as slag during
Last Answer : When copper pyrites is roasted in excess of air, a mixture of `CuO + FeO` is formed. `FeO` is present ... a basic flux D. CaO, which is a basic flux
Description : During the extraction of iron, slag produced is
Last Answer : During the extraction of iron, slag produced is A. Zone of heat absorption B. Zone of reduction only ... only D. Zone of reduction and zone of fusion
Description : Copper is refined commercially by a process of: w) smelting x) electrolysis y) sublimation z) roasting
Last Answer : ANSWER: X -- ELECTROLYSIS
Description : How is the slag obtained in the extraction of iron useful?
Last Answer : Slag obtained in blast furnace is used as one of theraw materials of glass and cement.
Description : The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag. (A) Fluidity (B) Basicity (C) Acidity (D) Viscosity
Last Answer : Option A
Description : __________ is used as a flux in the smelting of copper ore like chalcopyrite. (A) Coke breeze (B) Lime powder (C) Silica/quartz (D) Dolomite
Last Answer : (C) Silica/quartz
Description : In the extraction of copper the smelt formed in the blast furnace contians
Last Answer : In the extraction of copper the smelt formed in the blast furnace contians A. `CuS+"little"FeS` B. `Cu_(2) ... )O+"little"FeS` D. `Cu_(2)O+"little"FeO
Description : Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous
Last Answer : (i) Aluminium oxide (slag). *
Description : During smelting process, the combination of fuel in the furnace (A) Forms carbon dioxide (B) Carbon dioxide with carbon forms carbon mono-oxide (C) Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2 (D) All the above
Last Answer : Answer: Option D
Description : Is smelting a chemical change?
Last Answer : Generally yes. Smelting is used to separate raw ores into their component pieces to extract the pure metal, and in most cases this will involve chemical reactions of some form.
Description : In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite (ii) Malachite (iii) Calcite (iv) Copper pyrities
Last Answer : In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite ... Siderite (viii) Iron pyrite (ix) Ar gentite
Description : Extraction of __________ employs an electrolytic process. (A) Aluminium (B) Silver (C) Copper (D) All (A), (B) and (C)
Last Answer : (A) Aluminium
Description : Cast iron contains phosphorus as impurity. In Bessemerisation of this cast iron the slag formed is
Last Answer : Cast iron contains phosphorus as impurity. In Bessemerisation of this cast iron the slag formed is A. `FePO_(4)` B. ` ... (4)` D. `Zn_(3)(PO_(4))_(2)`
Description : Metals which can be extracted by smelting process are :
Last Answer : Metals which can be extracted by smelting process are : A. Zns B. Al C. Pb D. Fe
Description : The metallurgical process in which a metal is obtained in a fused state is called - (1) roasting (2) calcinations (3) smelting (4) froth floatation
Last Answer : (3) smelting Explanation: The metallurgical process in which a metal is obtained in a fused state is called smelting.
Description : Describe smelting process with neat labeled diagram.
Last Answer : Roasted copper ore is then mixed with coke & sand particles & then strongly heated at about 13500 C in a water jacketed blast furnace. At high temperature ferrous sulphide (FeS) is oxidised & ... of ferrous sulphide (FeS) is called as matte which is then removed from the lower outlet.
Description : Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron metallurgy)?
Last Answer : Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron ... CO` D. `CO_(2)+C rarr 2CO`
Description : Function of the flux added during smelting is
Last Answer : Function of the flux added during smelting is A. to make the ore porous B. to facilitate reduction C. to remove gangue D. to facilitate oxidation
Description : Pick out the wrong statement. (A) Dry process is used for the manufacture of cement, when the raw material is blast furnace slag (B) Portland cement is made employing wet process (C) Gypsum is added to Portland cement to lengthen its setting time (D) None of these
Last Answer : (D) None of these
Description : In AT welding process what is the role of asbestos powder & slag ? (i) To separate closing pin from portion* (ii) To hold the portion (iii) Both above are correct (iv) None of the above
Last Answer : (i) To separate closing pin from portion*
Description : In AT welding process what is the role of closing pin ? (i) To hold the portion before melt (ii) To hold the asbestos powder & slag (iii) Both above are correct* (iv) None of the above
Last Answer : (iii) Both above are correct*
Description : Which of the following reactions is not involved in extraction of Cu from copper pyrite ?
Last Answer : Which of the following reactions is not involved in extraction of Cu from copper pyrite ? A. `Cu_(2)S * Fe_(2 ... 2)` D. `FeO+ SiO_(2) rarr FeSiO_(3)`
Description : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt
Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and ... D. `Cu_(2)O +FeO`(large amount).
Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then ... CaSiO_(3)` D. `Cu_(2)O.SiO_(2)`
Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and ... (3)` D. To check the reduction of FeO
Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then ... O` D. `CuCO_(3).Cu(OH)_(2)`
Description : Which of the following reactions does not occur in Bessemer converter in the extraction of copper from chalcopyrites ?
Last Answer : Which of the following reactions does not occur in Bessemer converter in the extraction of copper from chalcopyrites ... 2Cu_(2)O rarr 6Cu + SO_(2)`
Description : Statement-1: Silica is added as a flux in reverberatory furnance, in the extraction of copper from copper pyrites. Statement-2: Silica decreases the m
Last Answer : Statement-1: Silica is added as a flux in reverberatory furnance, in the extraction of copper from ... Statement-1 is false but Statement -2 is true
Description : The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reaction
Last Answer : The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reaction A. ` ... D. `2Cu_(2)O+FeSto4Cu+Fe+SO_(2)`
Description : The most suitable method for extraction of copper from low grade sulphide ore is
Last Answer : The most suitable method for extraction of copper from low grade sulphide ore is A. Smelting ... process C. Leaching process D. Electrolytic process
Description : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts with its oxide to the give the metal
Last Answer : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts ... . If (A) is incorrect but (R ) is correct
Description : Name the sequential steps involved in extraction of copper from its copper pyrite ore.
Last Answer : sequential steps involved in extraction of copper from its copper pyrite ore
Description : Limestone is added in the blast furnace (during pig iron manufacture) to (A) Form slag by combining with impurities (B) Supply heat by undergoing exothermic reaction with impurities (C) Reduce the coke consumption (D) Reduce slag viscosity
Description : The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as (A) Low-heat Portland cement (B) Rapid hardening Portland cement (C) Portland blast slag cement (D) Portland pozzolana cement
Last Answer : Answer: Option A
Description : During pudding (A) Molten metal is kept clear of the fuel (B) Carbon is converted into carbonic acid gas (C) Silicon forms a slag (D) All the above
Description : The inner core ofan optical fiber is _______ in composition. A) glass or plastic B) copper C) bimetallic D) liquid
Last Answer : glass or plastic
Description : The inner core of an optical fiber is in composition. a. copper b. liquid c. glass or plastic d. bimetallic
Last Answer : c. glass or plastic
Description : Bronze is an alloy of copper, zinc , and tin having composition (A) 60% - 30% - 10% (B) 70% - 20% - 10% (C) 88% - 2% - 10% (D) 50% -30% - 20%
Last Answer : (C) 88% - 2% - 10%
Description : The composition of brass alloy is a) copper b)copper and gold c)copper and zinc d)tin and zinc
Last Answer : c)copper and zinc
Description : The percent composition by mass of copper in anhydrous cupric sulfate is about: w) 10% x) 25% y) 40% z) 75%
Last Answer : ANSWER: C -- 40%
Description : Can you name some videos on Gold and Silver finding, smelting, and buying?
Last Answer : I have no idea personally but have you tried Ebay?