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 : Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air in a reverberatory furnace to obtain th
Last Answer : Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air ... III and IV D. I , II , III and IV
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 : Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined with haematite. Reason: Haematite oxidises
Last Answer : Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined ... -1 is false but Statement -2 is true
Description : In reverberatory furnace, charge is heated mainly by (A) Conduction (B) Natural convection (C) Radiation of heat from the roof of the combustion chamber (D) None of these
Last Answer : (C) Radiation of heat from the roof of the combustion chamber
Description : Which is the most thermally efficient furnace? (A) Reheating furnace (B) Reverberatory furnace (C) Rotary kilns (D) Boiler furnace
Last Answer : (D) Boiler furnace
Description : Reverberatory furnace is used for (A) Roasting/reduction of ores (B) Annealing steel coil (C) Heating air (D) Steel melting
Last Answer : (A) Roasting/reduction of ores
Description : Which of the following is a directly fired intermittent furnace? (A) Walking beam reheating furnace (B) Reverberatory furnace (C) Tower furnace (D) Tunnel kiln
Last Answer : (B) Reverberatory furnace
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 : Matte smelting is used in the extraction of (A) Lead (B) Zinc (C) Aluminium (D) Copper
Last Answer : Option D
Description : Roasting of copper ore is carried out in which of the following furnace?
Last Answer : Roasting of copper ore is carried out in which of the following furnace? A. Reverberatory furnace B. ... furnace or blast furnace D. Neither 1 nor 2
Description : Electric furnace method for production of phosphorous uses phosphate rock and __________ (A) Phosphoric acid (B) Coke (C) Sulphuric acid (D) Silica and coke
Last Answer : (D) Silica and coke
Description : The refractory lining of the bottom in a basic electric arc furnace is made of (A) Silica (B) Alumina (C) Magnesia (D) Fireclay
Last Answer : Option C
Description : Why does fluorescent colored nail polish always have a matte finish?
Last Answer : Maybe a gloss would be too over the top? Nice chompers by the way. :)
Description : MacBooks: are matte screens still available on all models (Pro, Air, and standard) as a special order?
Last Answer : Matte screens are still available on the 15 and 17 inch MacBook Pros. Not on the air and the Macbook has been discontinued.
Description : Should i apply 10.0.6 MATTE oil-free moisturiser before or after my normal sunblock?
Last Answer : I would suggest that you find different products that go together like a mattifying moisturizer with SPF (MAC carries it) or something that’s not tinted. Maybe forego the tinted moisturizer and just use the sunblock since it’s more important.
Description : What is the best place online to buy Yerba Matte tea?
Last Answer : i’ll ask my wife when she wakes up. she got our matte somewhere on the web.
Description : Does color printing dry faster on matte paper than glossy?
Last Answer : What kind of ink is it?
Description : Glossy or matte display on a MacBook Pro for a graphic artist?
Last Answer : answer:both are high res and while the glossy has the apparent perception of blacker blacks, most graphics pros go with matte. The glare from the highly reflective glossy surface is a big ... your specific lighting conditions. Otherwise web graphics shouldn't be a problem for either display choice.
Description : What finish does the stainless steel have on the Bosch Integra SHX98M09UCCan I get it with a matte finish?
Last Answer : It is a brushed finished, which is not completely matte, but still has a good bit of shine.
Description : What is the difference between gloss photo paper and matte photo paper?
Last Answer : Gloss paper has a shiny side, matte paper looks dull. Gloss paper is often used mostly for pictures.
Description : Where can I order custom (preferably matte) printed professional, luxury (rip-tab) hard/rigid mailer/envelopes in low quantities?
Last Answer : We give life to your ideas when you tell them to us! We help you to give your packages get skillfully printed by the hands of specialists. As our motto is “more than just ink on paper,†... with the new trends of the market.Various options for customization are given to our clients. We think
Description : In the extraction of iron in the blast furnace, the reducing agent for the ore is
Last Answer : In the extraction of iron in the blast furnace, the reducing agent for the ore is A. Carbon monoxide B. Carbon dioxide C. Carbon D. Silica
Description : The main reactions occuring in blast furnace during extraction of iron from haematite ore…..
Last Answer : The main reactions occuring in blast furnace during extraction of iron from haematite ore .. A. `Fe_(2)O_ ... 3Cto2Fe+3CO` D. `CaO+SiO_(2)toCaSiO_(2)`
Description : Petroleum coke is used mainly in the (A) Discoloration of yellow glycerine (B) Sugar refining (C) Manufacture of carbon electrode (D) Blast furnace for reduction of iron ore
Last Answer : (C) Manufacture of carbon electrode
Description : Uranium is recovered from its ore (pitchblende) by (A) Froth floatation technique (B) Leaching with sulphuric acid (C) Smelting in a furnace (D) Dissolving in water
Last Answer : (B) Leaching with sulphuric acid
Description : __________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace. (A) Bauxite (B) Limestone (C) Quartz (D) Manganese
Last Answer : (B) Limestone
Description : Which is the main reducing agent during production of iron from iron ore in a blast furnace? (A) C (B) CO (C) CO2 (D) H2
Last Answer : (B) CO
Description : The main charge in blast furnace is usually (A) Iron ore & coke (B) Iron ore, coke & air (C) Limestone, coke & iron ore (D) Limestone, sand & iron ore
Last Answer : Limestone, coke & iron ore
Description : Which of the following contributes maximum as main source of sulphur in the blast furnace charge? (A) Sinter (B) Coke (C) Iron ore (D) Limestone
Last Answer : Coke
Description : Pick up the correct statement from the following: (A) In basic Bessemer process, the steel heats the converter (B) In open-hearth process, the furnace heats the steel (C) In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore (D) All the above
Last Answer : Answer: Option D
Description : Which of the following materials is used along with iron ore and limestone to produce iron in a modern blast furnace? w) coke x) cementite y) coal z) bauxite
Last Answer : ANSWER: W -- COKE
Description : Standard unit of turbidity of water is in one litre of distilled water, one milligram of finely divided (A) Silica (B) Mud (C) Clay (D) Organic matter
Last Answer : (A) Silica
Description : Wet chlorine gas produced during electrolysis of brine is dehydrated by (A) Spraying 66° Be H2SO4 counter current to the flow of the gas (B) Passing it through a bed of diatomaceous earth (C) Passing it through a bed of silica gel (D) None of these
Last Answer : (A) Spraying 66° Be H2SO4 counter current to the flow of the gas
Description : `Ag_(2)S` ore Is mixed with NaCl and heated in the presence of air then products formed are
Last Answer : `Ag_(2)S` ore Is mixed with NaCl and heated in the presence of air then products formed are A. `AgCl+Na_(2)SO_( ... S` C. `AgCl+SO_(2)` D. `Ag+SO_(2)`
Description : Coke ovens in steel plant are heated by (A) Electricity (B) Blast furnace gas/mixed gas (C) Coke oven gas (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Fuel used in B.F. stove is (A) Pulverised coal (B) Furnace oil (C) Blast furnace gas/mixed gas (D) Coke oven gas
Last Answer : (C) Blast furnace gas/mixed gas
Description : Mixed gas' used in steel plants is a mixture of (A) B.F. gas and coke oven gas (B) Coke oven gas and converter gas (C) Coke oven gas and L.P.G (D) Blast furnace gas and naphtha vapor
Last Answer : (A) B.F. gas and coke oven gas
Description : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry
Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.
Description : An ore contains 12% copper. How many kilograms of the ore are required to get 69 kg of copper? -Maths
Last Answer : 579 kg is the answer
Description : Write the name and symbol of copper [ Copper] main ore ?
Last Answer : The main ore of copper is called Copper Pyrites or Chalcopyritis and its symbol is CuFeS2 .
Description : Which ore contains both iron and copper?
Last Answer : Which ore contains both iron and copper? A. Cuprite B. Cualcocite C. Chalcopyrite D. Malachite and azurite are ores of copper
Description : Statement-I : `CuFeS_(2)` is concentrated by froath floatation method Statement-II : `CuFeS_(2)` is main ore of copper.
Last Answer : Statement-I : `CuFeS_(2)` is concentrated by froath floatation method Statement-II : `CuFeS_(2)` is main ore of copper.
Last Answer : Which ore contains both iron and copper? A. Chalcopyrite B. Malachite C. Cuprite D. Azurite
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
Last Answer : The ore which contains both iron and copper is chalcopyrite. Its molecular formula is CuFeS2. Its molecular formula shows that it contains both iron as well as copper.