What is the sign of cryolite ?

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Answer :

Cryolite signal na3alf6
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Statement -I :Cryolite is used in electrolytic extraction of Al from alumuna.Statement -2: It dissilves alumina

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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

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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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In the elactrolytic extraction of aluminium, cryolite is used.

Description : In the elactrolytic extraction of aluminium, cryolite is used.

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(A) Alumina has hgih condutivity (R ) The mixture of alumia and cryolite is used for electrolytic reduction in order to extract aluminium

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

In the electrolusis of alumina. Cryolite is absorbed to

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

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

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)

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

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.

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

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.

What is cryolite? Write its chemical formula.

Description : What is cryolite? Write its chemical formula.

Last Answer : Cryolite is chemically sodium aluminium fluoride. Its molecular formula is Na3AlF6.

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

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.

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

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

Phosphoric acid is prepared from (A) Cryolite (B) Chalcopyrite (C) Rock phosphate (D) None of these

Description : Phosphoric acid is prepared from (A) Cryolite (B) Chalcopyrite (C) Rock phosphate (D) None of these

Last Answer : (C) Rock phosphate

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%.

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

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

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

Which of the following is not an ore of copper? (A) Cryolite (B) Azurite (C) Chalcopyrite (D) Malachite

Description : Which of the following is not an ore of copper? (A) Cryolite (B) Azurite (C) Chalcopyrite (D) Malachite

Last Answer : Option A

Which of the following is not an ore of copper? (A) Cryolite (B) Azurite (C) Chalcopyrite (D) Malachite

Description : Which of the following is not an ore of copper? (A) Cryolite (B) Azurite (C) Chalcopyrite (D) Malachite

Last Answer : Option A

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

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

Last Answer : ANSWER: HALL PROCESS

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

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

Last Answer : Cryolite

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

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

Last Answer : bauxite