Description : Extraction of __________ employs an electrolytic process. (A) Aluminium (B) Silver (C) Copper (D) All (A), (B) and (C)
Last Answer : (A) Aluminium
Description : Pick out the wrong statement about coating/electroplating of metals. (A) Phosphate coating is used as an excellent base for paints & enamels (B) Phosphate coating is less corrosion resistant than ... coating metal is made the anode (D) Calorising is the process of coating steel with chromium
Last Answer : (D) Calorising is the process of coating steel with chromium
Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution
Last Answer : (D) Cl2 , H2 & NaOH solution
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 : For extraction of sodium from `NaC1`, the electrolytic mixture `Nac1+Na_(3)A1F_(6) +Cac1_(2)` is used. During extractions process, only sodium is depo
Last Answer : For extraction of sodium from `NaC1`, the electrolytic mixture `Nac1+Na_(3)A1F_(6) +Cac1_(2)` is used. During ... that of `K^(+)` and `Ca^(+2)` ions
Description : Electrolytic reduction cell used for conversion of calcined Al2O3to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to (A) Achieve very high ... by the generation of heat (C) Electrolytically dissociate alumina (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C)
Description : The arcing contacts in a circuit breaker are made of (a) copper tungsten alloy (b) porcelain (c) electrolytic copper (d) aluminium alloy
Last Answer : (a) copper tungsten alloy
Description : Inverter cell anode and cathode of the…………. cell is used for vehicle (a) Copper electrode zinc (b)Zinc copper (c) Aluminium zinc (d)Nickel Cobalt
Last Answer : (a) Copper electrode zinc
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 : (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 : 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 : Which of the following metals is not subjected to electrolytic refining/purification? (A) Copper (B) Zinc (C) Tin (D) Aluminium
Last Answer : (C) Tin
Description : Describe construction of Aluminium Electrolytic capacitor.
Last Answer : A plain foil dry electrolytic capacitor is made by forming a coating of aluminium oxide on both sides of an aluminium foil. Two strips of aluminium foil used are then separated by two layers of porous ... is rolled up the ends closed with wax and then sealed into an aluminium container.
Description : State the functions of following essential parts of electrolytic capacitor. 1. Aluminium foil 2. Oxide film 3. Spacers 4. Aluminium container
Last Answer : 1. Aluminium Foil – It serves as a positive electrode called anode 2. Oxide film – It acts as a dielectric medium. 3. Spacer- It is used to provide separation and hold the electrolyte. 4. Aluminium container- It serves as a negative electrode called cathode.
Description : Explain electrolytic refining of aluminium with neat labelled diagram
Last Answer : Process: 1) The electrolytic cell consists of an iron tank lined at the bottom with carbon, which serve as anode. A number of graphite rods serve as cathode. 2) The cell is filled with three ... Crude or impure Al is added to the bottom layer from time to time. The process is thus continued.
Description : Describe the process of purification of aluminium by electrolytic refining with the help of neat, labelled diagram.
Last Answer : Process: 1) The electrolytic cell consists of an iron tank lined at the bottom with carbon, which serve as anode. A number of graphite rods serve as cathode. 2) The cell is filled with ... . Crude or impure Al is added to the bottom layer from time to time. The process is thus continued.
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 : Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda? (A) Diaphragm electrolytic cell process (B) Mercury electrolytic cell process (C) Lime-soda process (D) None of these
Last Answer : (C) Lime-soda process
Description : In the commercial electrochemical process for aluminium extraction, the electrolyte used is
Last Answer : In the commercial electrochemical process for aluminium extraction, the electrolyte used is A. `Al(OH)_(3)`in NaOH ... of AlO (OH) and `Al(OH)_(3)`
Description : In the extraction of aluminium metal , one of the process is summarised as follows : Which of the following entrie correctly summarises reagents , ele
Last Answer : In the extraction of aluminium metal , one of the process is summarised as follows : Which of the following ... ), Na_(3)AlF_(6) , "Cathode"):}`
Description : Statement -1:Aluminothermy is used for extraction of chromium from chromium oxide. Statement-2: Aluminium is reducing agent.
Last Answer : Statement -1:Aluminothermy is used for extraction of chromium from chromium oxide. Statement-2: Aluminium is ... -1 is false but Statement -2 is true
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
Last Answer : In the commercial electrochemical process for aluminium extraction, the electrolyte used is A. `Al(OH)_(2)` is NaOH ... Al_(2)O_(3)` and `Al(OH)_(3)`
Description : In the extraction of aluminium by Hall-Heroult process purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to
Last Answer : In the extraction of aluminium by Hall-Heroult process purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to A ... ^(3+)` into Al(s)` D. acts as catalyst
Description : Simplest way of extraction of aluminium is discovered by?
Last Answer : Charles Martin Hall
Description : Which scientific method is used for the production/extraction of Aluminium?
Last Answer : Hall Heroult process
Description : Briefly explain the extraction of aluminium from alumina with chemical equations.
Last Answer : Aluminium oxide dissolved in molten cryolite is taken in a chamber with gently sloped base.The inner wall is made of carbon lining. Graphite rods are introduced in the electrolyte bath. The carbon lining ... is passed. Molten aluminium collects at the lining and flows out of the gently sloped base.
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 : Why is pure alumina needed for the extraction of aluminium?
Last Answer : For electrolysis of we need pure alumina. Hence bauxite is converted into alumina by chemical process.
Description : Why is extraction of aluminium not commercially viable by using reducing agents like coke? OR Coke is used in the extraction of iron but not in the extraction of aluminium. Why? OR Aluminium cannot be extracted by heating bauxite and coke. Why?
Last Answer : Oxygen of aluminium oxide cannot be easily taken away by reducing agents like coke.
Description : Electrometallurgy is not involved in the extraction of __________ from its ore. (A) Aluminium (B) Tin (C) Lead (D) Both (B) & (C)
Description : Matte smelting is used in the extraction of (A) Lead (B) Zinc (C) Aluminium (D) Copper
Last Answer : Option D
Description : Define the term metallurgy. Name the process of extraction of Aluminium.
Last Answer : Metallurgy:-The process of extraction of metal from its ore economically & profitably is called as metallurgy. The process used for extraction of Aluminium metal is Bayer’s process, Electrolytic reduction of alumina, Electrolytic refining.
Description : Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and (A) Moving mercury and graphite (B) Graphite and moving mercury (C) Moving mercury and carbon (D) Moving mercury and crimped steel wire
Last Answer : (B) Graphite and moving mercury
Description : Can someone possibly explain or summarize the chemistry in this electrolytic cell patent for me (see link in details)
Last Answer : answer:This is a pretty complicated patent, more complicated than could easily be explained/summarized here (at least without writing a volume nearly as long as the patent you've linked). I recall learning about this ... about it I may be able to help, but there's a lot there to just summarize it.
Description : What is the value of electrolytic ball of simple voltaic cell ?
Last Answer : The value of the electromotive ball of a simple voltaic cell is 1.08 volts.
Description : What is Electrolytic Cell ?
Last Answer : The cell in which electrolysis is performed is called electrolysis cell
Description : What is the voltage of an electrolytic cell of nickel and copper?
Last Answer : -0.59 V
Description : Is an electrolytic cell?
Last Answer : A cell with a negative voltage charge.
Description : Which of the following is an electrolytic cell A. lron * (ll) * (Fe) oxidized, aluminum (Al) reduced O B. Silver (Ag) oxidized, gold (Au) reduced C. Aluminum () oxidized (Zn) reduced LithiumD. (Li) oxidized, (Zn) reduced?
Last Answer : The answer is not c.
Description : Where does reduction occur in an electrolytic cell?
Last Answer : Cathode
Description : What is the voltage of an electrolytic cell copper and magnesium electrodes?
Last Answer : -2.71 V
Description : Diaphragm electrolytic cell as compared to mercury electrolytic cell (A) Produces 70% NaOH solution (B) Requires less specific power consumption for the production of chlorine (C) Requires lesser investment for similar capacity (D) All (A), (B) and (C)
Last Answer : (C) Requires lesser investment for similar capacity
Description : Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent. (A) 10 (B) 25 (C) 50 (D) 98
Last Answer : (C) 50
Description : Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C. (A) 25 (B) 60-70 (C) 150-200 (D) 250-300
Last Answer : (B) 60-70
Description : Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda? (A) High cost of mercury (B) High specific gravity of mercury (C) Non-availability of high purity mercury (D) Pollution of water stream by mercury
Last Answer : (D) Pollution of water stream by mercury
Description : Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it (A) Has larger production capacity per unit cell (B) Consumes less power per ton of Cl2 produced (C) Produces high purity (70%) caustic soda directly (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)