Name the process used to obtain Aluminum by electrolysis of aluminum oxide dissolved in molten cryolite?

Name the process used to obtain Aluminum by electrolysis of aluminum oxide dissolved in molten cryolite?
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ANSWER: HALL PROCESS
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Last Answer : Ans:(d)

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

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Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. Coke powder is spreadded over the molten electro

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What is the role of molten cryolite in the extraction of aluminium?

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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 the aluminium deposited on the cathode comes from cryolite (C) Sodium is deposited along with aluminium, but is immediately vaporised (D) Anode effect sets in when the cryolite concentration goes below 40%.

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Last Answer : (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3

What molten substance is used in the Hall process to reduce aluminum?

Description : What molten substance is used in the Hall process to reduce aluminum?

Last Answer : ANSWER: CRYOLITE

The electrolysis of molten sodium hydride librates hydrogen gas at the ------------- .

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36. Aluminium is extracted from alumina (Al2O3 ) by electrolysis of a molten mixture of : (1) Al2O3 + KF + Na3AlF6 (2) Al2O3 + HF + NaAlF4 (3) Al2O3 + CaF2 + NaAlF4 (4) Al2O3 + Na3AlF6 + CaF2

Description : 36. Aluminium is extracted from alumina (Al2O3 ) by electrolysis of a molten mixture of : (1) Al2O3 + KF + Na3AlF6 (2) Al2O3 + HF + NaAlF4 (3) Al2O3 + CaF2 + NaAlF4 (4) Al2O3 + Na3AlF6 + CaF2

Last Answer : Al2O3 + Na3AlF6 + CaF2

Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium

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What substance is produced at the cathode in the electrolysis of molten sodium chloride?

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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_(

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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

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Description : Give reason for the following observation (L-III) (a)- The tendency for catenation decreases down the group in group 14 (b)- The decreasing stability of+3 oxidation state with increasing atomic no. in group 13. (c)- Molten aluminum bromide is a poor conductor of electricity.

Last Answer : Ans. -(a) it is due to decrease in bond dissociation energy which is due to increase in atomic size C-C > Si-Si >Ge-Ge>Sn-Sn>Pb-Pb. (b)- It is due to inert pair effect. (c)- Molten AlBr3 is poor conductor of electricity because it is covalent compound.

Give reason for the following: (a) Aluminium oxide is considered as an amphoteric oxide. (b) Ionic compounds conduct electricity in molten state. -Chemistry

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Aluminium is obtained by the electrolysis of pure of `Al_(2)O_(3)` dissolved in

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What metal is used as a reducing agent to obtain iron from iron oxide in the Thermite process?

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Last Answer : Nitrogen dioxide

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The function of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult process is to

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Which one of the following mineral does not contain oxygen? (1) Haematite (2) Bauxite (3) Cryolite (4) Calcite

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The important ore of aluminium is – (1) bauxite (2) cryolite (3) fluorspar (4) haematite

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Which one of the following mineral does not contain oxygen ? (1) Haematite (2) Bauxite (3) Cryolite (4) Calcite

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How many moles of aluminum oxide are present in a sample having a mass of 178.43g?

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Which rotary instrument gives the smoothest enamel cut? a. carborundum stone (green stone) b. aluminum oxide stone (white stone) c. plain fissure bur d. cross-cut fissure bur e. medium diamond bur (great efficiency but roughest cut)

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(3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be plated the negative electrode (cathode) or plate in a galvanic couple. Thus a spoon or other object may be connected by a wire to a plate of nickel. The process that occurs on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.

Description : (3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be ... on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.

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The manufacturing of iron from ironore involves the process of - (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation

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Last Answer : (2) Reduction Explanation: Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as hematite contain iron oxide. The oxygen must be removed from the iron oxide to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.

The manufacture of iron from iron ore involves the process of – (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis

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_______ is the process in which acids and bases react to form salts and water. (1) Neutralization (2) Electrolysis (3) Distillation (4) Hydrolysis

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In electrolysis, what process always occurs at the anode?

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What is the process by which an atom gains electrons? w) Reduction x) Neutralization y) Electrolysis z) Oxidation

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The manufacturing of iron from ironore involves the process of (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation

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Last Answer : Reduction

The manufacture of iron from iron ore involves the process of (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis

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To obtain chromium from chromic oxide `(Cr_(3)O_(3))` the method used is

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What is the sign of cryolite ?

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