Copper is refined by - (1) roasting (2) oxidation (3) electrolysis (4) zone refining

Copper is refined by - (1) roasting (2) oxidation (3) electrolysis (4) zone refining
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(1) roasting Explanation: Copper is refined by the method of roasting. In the roaster, the copper concentrate is partially oxidised to produce "calcine" and sulfur dioxide gas. In roasting, the ore or ore concentrate is treated with very hot air. This process is generally applied to sulphide minerals.
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Copper is refined by (1) roasting (2) oxidation (3) electrolysis (4) zone refining

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Description : Explain the process of zone refining. Name one metal refined by this method.

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Heating of a ore below its melting point in the absence of air is known as – (1) Refining (2) Calcination (3) Roasting (4) Smelting

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Heating of a ore below its melting point in the absence of air is known as (1) Refining (2) Calcination (3) Roasting (4) Smelting

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The working of a dry cell is based on - (1) Decomposition reaction (2) Spontaneous oxidation-reduction reaction (3) Combination reaction. (4) Electrolysis

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

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

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Aluminium can be purified by (1) oxidation (2) distillation (3) electrolysis (4) ozonolysis

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Blister copper is refined by stirring moltem impure metal with green logs of wood because such a wood liberated hydrocarbon gases like `(CH_(4))`. The

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Metals of high purity are obtained by zone refining. Impurities are more soluble in melt in pure metal.

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Zone refining is based on the principle of

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Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.

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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

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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

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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

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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

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Roasting of copper ore is carried out in which of the following furnace?

Description : Roasting of copper ore is carried out in which of the following furnace?

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Copper is purifed by electrolaytic refining of blister copper ,The correct statement (s) about this prcess is (are)

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Which of the following common element(s) is/are present in the anode mud in elctrolytic refining of copper ?

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Briefly explain the electrolytic refining of copper.

Description : Briefly explain the electrolytic refining of copper.

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Which of the following metals is not subjected to electrolytic refining/purification? (A) Copper (B) Zinc (C) Tin (D) Aluminium

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

Explain electro-refining of blister copper:

Description : Explain electro-refining of blister copper: 

Last Answer : 1. It is carried out in the large lead lined tank. 2. Impure Copper is placed into large plates which are suspended into tank at intervals & acts as anode. 3. Cathodes are thin plates of pure ... pure copper is deposited on the cathodes. 7. Electro - refined copper is about 99.99% pure.

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

Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction? (A) Oxidation of Na + ions (B) Oxidation of Cl - ions (C) Reduction of Na + ions (D) Reduction of Cl - ions

Description : Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction? (A) Oxidation of Na + ions (B) Oxidation of Cl - ions (C) Reduction of Na + ions (D) Reduction of Cl - ions

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When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes are

Description : When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes are

Last Answer : When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes ... "),("Pure Zinc","ImPure Zinc"):}`

(4) sodium chloride contains hygroscopic impurities like magnesium chloride Explanation: Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that make it freeflowing (anticaking agents) such as sodium aluminosilicate or magnesium carbonate. Because of Hygroscopic nature of salt it become wet in rainy season as the salt absorbs moisture from environment.

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Last Answer : Which of the following could be used as fuel in propellant or rockets? (1) Liquid Hydrogen + Liquid Nitrogen (2) Liquid Oxygen + Liquid Argon (3) Liquid Nitrogen + Liquid Oxygen (4) Liquid Hydrogen + Liquid Oxygen

In electro-refining, the pure metal is deposited on – (1) vessel (2) electrolyte (3) cathode (4) anode

Description : In electro-refining, the pure metal is deposited on – (1) vessel (2) electrolyte (3) cathode (4) anode

Last Answer : (3) cathode Explanation: In electro-refining, the anodes consist of unrefined impure metal, and as the current passes through the acidic electrolyte the anodes are corroded into the solution so ... pure metal onto the cathodes. Electrolytic refining is used to extract impurities from crude metals.

In electro-refining, the pure metal is deposited on (1) vessel (2) electrolyte (3) cathode (4) anode

Description : In electro-refining, the pure metal is deposited on (1) vessel (2) electrolyte (3) cathode (4) anode

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What would cause you to switch from what you currently use to sweeten things (whether it's refined sugar, honey, non-sugar sweetener, etc.)?

Description : What would cause you to switch from what you currently use to sweeten things (whether it's refined sugar, honey, non-sugar sweetener, etc.)?

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