Description : Which of the following is not an ore of copper? (A) Cryolite (B) Azurite (C) Chalcopyrite (D) Malachite
Last Answer : Option A
Description : how many of the following are ores of copper chalopyrite Cuprite , chalcoite ,malachite Azurite ,Bornite ,Limonite ,Zicite ,Braunite .
Last Answer : how many of the following are ores of copper chalopyrite Cuprite , chalcoite ,malachite Azurite ,Bornite ,Limonite ,Zicite ,Braunite .
Description : Malachite and azurite are_ores of copper
Last Answer : Malachite and azurite are_ores of copper A. carbonate B. oxide C. sulphide D. silicate
Description : How many of the following are metal carbonates : Dolomite ,Malachite ,Azurite ,Siderite Calamine , Magnasite ,Limestone ,Washing soda ,Cerussite
Last Answer : How many of the following are metal carbonates : Dolomite ,Malachite ,Azurite ,Siderite Calamine , Magnasite ,Limestone ,Washing soda ,Cerussite
Description : Phosphoric acid is prepared from (A) Cryolite (B) Chalcopyrite (C) Rock phosphate (D) None of these
Last Answer : (C) Rock phosphate
Description : Chalcopyrite is the main ore of (A) Copper (B) Lead (C) Tin (D) Iron
Last Answer : (A) Copper
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 : The main ore of uranium is (A) Pitchblende (B) Monazite sand (C) Cassiterite (D) Chalcopyrite
Last Answer : (A) Pitchblende
Description : __________ is an ore of lead. (A) Quartz (B) Galena (C) Siderite (D) Chalcopyrite
Last Answer : (B) Galena
Description : Pig iron is produced by blast furnaces in India using mostly the iron ore named (A) Hematite (B) Magnetite (C) Siderite (D) Chalcopyrite
Last Answer : (A) Hematite
Description : Which of the following is an ore of iron? (A) Galena (B) Chalcopyrite (C) Hematite (D) Bauxite
Last Answer : (C) Hematite
Description : Statement -1 In the electltic reduction of `Al_(2)O_(3)`cryolite is used . Statement -2: Cryolite si an ore of aluminium
Last Answer : Statement -1 In the electltic reduction of `Al_(2)O_(3)`cryolite is used . Statement -2: Cryolite si an ore of aluminium
Description : The important ore of aluminium is – (1) bauxite (2) cryolite (3) fluorspar (4) haematite
Last Answer : (1) bauxite Explanation: Bauxite is an aluminium ore and is the main source of aluminium. This form of rock consists mostly of the minerals gibbsite, boehmite and diaspore , in a mixture ... it was first recognized as containing aluminium and named by the French geologist Pierre Berthier in 1821.
Description : The important ore of aluminium is (1) bauxite (2) cryolite (3) fluorspar (4) haematite
Last Answer : bauxite
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 : Which of the following minerals is a source of copper? w) Bauxite (pron: box-ite) x) Hematite y) Malachite z) Galena
Last Answer : ANSWER: Y -- MALACHITE
Description : Identify the correct statement. (A) Sphlerite is zinc oxide (B) The first law of the thermodynamics is stated as δE = δQ - δW (C) Lead can be produced in a blast furnace (D) T. ferrooxidans is a fungus that can be used for leaching chalcopyrite
Description : Number of oxide orwesd among , (i) Cassiterite (ii) pyrolusite (iii) Kieserite (iv) Azurite (V) chromite (vi) siderite are.
Last Answer : Number of oxide orwesd among , (i) Cassiterite (ii) pyrolusite (iii) Kieserite (iv) Azurite (V) chromite (vi) siderite are.
Description : What is the chemical composition of azurite mineral?
Last Answer : What is the answer ?
Description : Among the following list of malachite ,marble anglestite ,azurtite ,dolomite ,sedererite ,calamine and chromite
Last Answer : Among the following list of malachite ,marble anglestite ,azurtite ,dolomite ,sedererite ,calamine and chromite
Description : Is the Malachite rock Sedimentary or Metamorphic?
Last Answer : Both. You're Welcome.
Description : Which one of the following is a mineral of iron? (1) Magnetite (2) Malachite (3) Cassiterite (4) Pyrolusite
Last Answer : Magnetite
Description : Which of the following minerals is a source of lead? w) Bauxite x) Hematite y) Malachite z) Galena
Last Answer : ANSWER: Z -- GALENA
Description : Which of the following minerals is a source of iro w) Bauxite (pron: box-ite) x) Hematite (pron: he-ma-tite) y) Malachite (pron: mal-ah-kite) z) Galena (pron: ga-lee-nah)
Last Answer : ANSWER: X -- HEMATITE
Description : The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by (A) Electrolysis (B) Electrolytic reduction (C) Electrolytic oxidation (D) None of these
Last Answer : (B) Electrolytic reduction
Description : Identify the correct statement with reference to the extractive metallurgy of aluminium. (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3 (B) Approximately 80% of ... is immediately vaporised (D) Anode effect sets in when the cryolite concentration goes below 40%.
Last Answer : (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
Description : The Al2O3 content of cryolite in Hall-Heroult cell is maintained between __________ percent. (A) 2-5 (B) 18-20 (C) 12-15 (D) 6-12
Last Answer : (A) 2-5
Description : Copper is dissolved from its ore by H2SO4 in a percolation tank made of (A) Wood (B) Stainless steel (C) Reinforced concrete lined with lead (D) High silicon iron (14% Si)
Last Answer : (C) Reinforced concrete lined with lead
Last Answer : Cryolite signal na3alf6
Description : Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite)` Cathode : fraphite inside Fe -Container Coke power is spreased over the
Last Answer : Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite)` Cathode : fraphite inside Fe ... aluminmum by air D. (A) and (B) both
Description : Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite) ` Cathode : fraphite inside Fe -Container The purpose of adding cryolite
Last Answer : Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite) ` Cathode : fraphite inside ... the impurities as slag D. Both (a) & (B)
Description : Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite)` Cathode : fraphite inside Fe -Container Pick out the statement which is
Last Answer : Electrolytic reducation of `Al_(2)O_(3)` Electrolyte `(Al_(2)O_(3)+cryolite)` Cathode : fraphite ... 2)` D. nikkel may be affected at high temperature
Description : Statement -I :Cryolite is used in electrolytic extraction of Al from alumuna.Statement -2: It dissilves alumina
Last Answer : Statement -I :Cryolite is used in electrolytic extraction of Al from alumuna. Statement -2: It dissilves alumina
Description : The function of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult process is to
Last Answer : The function of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult ... D. increase the electrical canductivity of alumina
Description : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. Coke powder is spreadded over the molten electro
Last Answer : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. ... of molten aluminium by air D. (a) both (b)
Description : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. The purpose of adding crylite is :
Last Answer : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. ... . to increase melting point of `Al_(2)O_(3)`
Description : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. What is wrong if anode is made of nickel instant
Last Answer : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite ... CO D. Nickel May be affected by high temperature.
Description : The major role of fluorpar (`CaF_2` ) which added in small quantities in the electrolyte reduction of alumina dissolved in fused cryolite `(N_(3)AlF_(
Last Answer : The major role of fluorpar (`CaF_2` ) which added in small quantities in the electrolyte reduction ... the rate of oxidation of carbon at the anode
Description : The major role of flourspar, `CaF_(2)` which is added in small amount in the electrolytic reduction of `Al_(2)O_(3)` dissolved on fused cryolite in fu
Last Answer : The major role of flourspar, `CaF_(2)` which is added in small amount in the electrolytic reduction ... the rate of oxidation of carbon at the anode
Description : In the elactrolytic extraction of aluminium, cryolite is used.
Last Answer : In the elactrolytic extraction of aluminium, cryolite is used. A. Lower the melting point of ... impurities from alumina D. Minimise the anodic effect
Description : (A) Alumina has hgih condutivity (R ) The mixture of alumia and cryolite is used for electrolytic reduction in order to extract aluminium
Last Answer : (A) Alumina has hgih condutivity (R ) The mixture of alumia and cryolite is used for electrolytic reduction ... (A) is incorrect but (R ) is correct
Description : In the electrolusis of alumina. Cryolite is absorbed to
Last Answer : In the electrolusis of alumina. Cryolite is absorbed to A. Lower that melting point of alumia B ... the anode effect D. Remove impurities form alumia
Description : Aluminium is extracted from bauxite (a) By reduction with carbon (b) By reduction with Mg (c) By reduction with CO (d) By electrolysis in molten cryolite
Last Answer : Ans:(d)
Description : Which one of the following mineral does not contain oxygen? (1) Haematite (2) Bauxite (3) Cryolite (4) Calcite
Last Answer : (3) Cryolite Explanation: Cryolite (Na3AlF6, sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
Description : What is cryolite? Write its chemical formula.
Last Answer : Cryolite is chemically sodium aluminium fluoride. Its molecular formula is Na3AlF6.
Description : What is the role of molten cryolite in the extraction of aluminium?
Last Answer : When pure alumina is mixed with molten cryolite, it forms an electrolyte at 1223K. Molten cryolite also acts as a solvent for alumina.
Description : Name the process used to obtain Aluminum by electrolysis of aluminum oxide dissolved in molten cryolite?
Last Answer : ANSWER: HALL PROCESS
Description : Which one of the following mineral does not contain oxygen ? (1) Haematite (2) Bauxite (3) Cryolite (4) Calcite
Last Answer : Cryolite
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