Which of the following reduction reactions are actually employed in commercial extraction of metals ?

Which of the following reduction reactions are actually employed in commercial extraction of metals ?
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Which of the following reduction reactions are actually employed in commercial extraction of metals ? A. `Fe_(2 ... + 2CuO rarr 3Cu + SO_(2) uparrow `
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Which of the following reduction reactions are actually employed in commercial extraction of metals?

Description : Which of the following reduction reactions are actually employed in commercial extraction of metals?

Last Answer : Which of the following reduction reactions are actually employed in commercial extraction of metals? A. `Fe_(2)O_(3 ... (2)S + 2CuO rarr 6Cu + SO_(2)`

For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?

Description : For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?

Last Answer : For how many metals of `10^(th)`12 th and `14^(th)` groups in periodic chart, Extraction is possible by self - reduction mrthod ?

During extraction of a maxillary third molar the tuberosity is fractured; however, it remains in place attached to the mucoperiosteum. Which of the following procedures should be employed:** A. Remove the tuberosity and suture B. Leave the tuberosity and stabilize if required C. Remove the tuberosity and fill the defect with Gelfoam then suture. D. If fractured tuberosity is greater than 2 cm, leave in place and suture

Description : During extraction of a maxillary third molar the tuberosity is fractured; however, it remains in place attached to the mucoperiosteum. Which of the following procedures should be employed:** A. Remove the ... then suture. D. If fractured tuberosity is greater than 2 cm, leave in place and suture

Last Answer : B. Leave the tuberosity and stabilize if required

Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ? (A) Invar (B) Constantan (C) Chromel (D) Alumel

Description : Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ? (A) Invar (B) Constantan (C) Chromel (D) Alumel

Last Answer : (A) Invar

Pick out the wrong statement: (A) Magnetic separation method can be employed to treat both dry & wet ores (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size (C) Gyratory crusher is used for coarse crushing (D) Screens are of stationary, moving and vibratory types

Description : Pick out the wrong statement: (A) Magnetic separation method can be employed to treat both dry & wet ores (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed ... ) Gyratory crusher is used for coarse crushing (D) Screens are of stationary, moving and vibratory types

Last Answer : (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size

Which of the following pairs is not correctly matched with respect to the extraction of metals from their ores ?

Description : Which of the following pairs is not correctly matched with respect to the extraction of metals from their ores ?

Last Answer : Which of the following pairs is not correctly matched with respect to the extraction of metals from ... -Aluminium and tin from their oxides ores .

Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following

Description : Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following

Last Answer : Minerals from which metals can be extracted economically and easily are called ores. The ... . D. roasting followed by electrolytic reduction.

Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following

Description : Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following

Last Answer : Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from ... 2)S+2Cu_(2)O rarr 6Cu+SO_(2)`

Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get discharged and this value is e

Description : Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get discharged and this value is e

Last Answer : Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get ... 3)` D. `H_(2)S_(2)O_(8)`

Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get discharged and this value is e

Description : Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get discharged and this value is e

Last Answer : Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get ... ,H_(2)` D. `O_(2),H_(2)`

Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get discharged and this value is e

Description : Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get discharged and this value is e

Last Answer : Electrolysis is an impotant technique for extraction of metals, and each of the solution needs a minimum voltage to get ... ` C. `Br_(2)` D. `O_(2)`

Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually carried out from its bauxite or

Description : Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually carried out from its bauxite or

Last Answer : Refining process of impure metals depends upon the differences in properties of the metal. ... . leaching C. liquation D. magnetic seperation

Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually carried out from its bauxite or

Description : Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually carried out from its bauxite or

Last Answer : Refining process of impure metals depends upon the differences in properties of the metal. Extraction of Al is usually ... A D. I-D,II-A,III-C,IV-B

Statement-1: Carbon is not used as a reducing agent for the extraction of group 2 metals. Statement-2: Carbon reacts with group 2 metal to give carbid

Description : Statement-1: Carbon is not used as a reducing agent for the extraction of group 2 metals. Statement-2: Carbon reacts with group 2 metal to give carbid

Last Answer : Statement-1: Carbon is not used as a reducing agent for the extraction of group 2 metals. Statement ... Statement-1 is false but Statement -2 is true

Match the extraction processes listed in column I with metals listed in column II.

Description : Match the extraction processes listed in column I with metals listed in column II.

Last Answer : Match the extraction processes listed in column I with metals listed in column II. A. a-p,r, b-p,r, c-q , d-s B. a ... -r D. a-p,s, b-p,r,c-q, d-s, r

One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its extraction. This metal is

Description : One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its extraction. This metal is

Last Answer : One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its ... . Nickel B. Iron C. Cobalt D. Vanadium

The common method for the extraction of metals from the oxide ore is :

Description : The common method for the extraction of metals from the oxide ore is :

Last Answer : The common method for the extraction of metals from the oxide ore is : A. Reduction with carbon B. ... . reduction with `H_(2)` D. electrolytic method

Leaching can be used for the extraction of which metals (i) Pb (ii) Al (iii) Ag (iv) Au

Description : Leaching can be used for the extraction of which metals (i) Pb (ii) Al (iii) Ag (iv) Au

Last Answer : Leaching can be used for the extraction of which metals (i) Pb (ii) Al (iii) Ag (iv) Au A. (ii) (iii) and ... iii) C. (ii) and (iv) D. (iii) and (iv)

The process of extraction of metals from their ores; and then refining them for use is known as?

Description : The process of extraction of metals from their ores; and then refining them for use is known as?

Last Answer : metallurgy

Which scientific method is used for the production/extraction of Noble metals?

Description : Which scientific method is used for the production/extraction of Noble metals?

Last Answer : Cyanide process

Electrometallurgical methods of metal extraction is normally used for those metals (A) Whose oxide/ore is not reduced by carbon (B) Which fall in the category of alkali & alkaline earth metals (C) Which stands higher in the electrochemical series of the metal (D) All (A), (B) & (C)

Description : Electrometallurgical methods of metal extraction is normally used for those metals (A) Whose oxide/ore is not reduced by carbon (B) Which fall in the category of alkali & alkaline earth metals (C) Which stands higher in the electrochemical series of the metal (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Which of the following reactions is not involved in extraction of Cu from copper pyrite ?

Description : Which of the following reactions is not involved in extraction of Cu from copper pyrite ?

Last Answer : Which of the following reactions is not involved in extraction of Cu from copper pyrite ? A. `Cu_(2)S * Fe_(2 ... 2)` D. `FeO+ SiO_(2) rarr FeSiO_(3)`

Which of the following reactions does not occur in Bessemer converter in the extraction of copper from chalcopyrites ?

Description : Which of the following reactions does not occur in Bessemer converter in the extraction of copper from chalcopyrites ?

Last Answer : Which of the following reactions does not occur in Bessemer converter in the extraction of copper from chalcopyrites ... 2Cu_(2)O rarr 6Cu + SO_(2)`

Identify the metal `M` whose extraction is based on the following reactions: `MS +2O_(2)rarr MSO_(4)` `2MS +3O_(2)rarr 2MO +2SO_(2)` `MS +2MO rarr 3M

Description : Identify the metal `M` whose extraction is based on the following reactions: `MS +2O_(2)rarr MSO_(4)` `2MS +3O_(2)rarr 2MO +2SO_(2)` `MS +2MO rarr 3M

Last Answer : Identify the metal `M` whose extraction is based on the following reactions: `MS +2O_(2)rarr MSO_(4)` `2MS + ... 4),Pb, PbO` D. `PbS,PbSO_(4) , PbO`

The main reactions occuring in blast furnace during extraction of iron from haematite ore…..

Description : The main reactions occuring in blast furnace during extraction of iron from haematite ore…..

Last Answer : The main reactions occuring in blast furnace during extraction of iron from haematite ore .. A. `Fe_(2)O_ ... 3Cto2Fe+3CO` D. `CaO+SiO_(2)toCaSiO_(2)`

The carbon-based reduction method is NOT used for the extraction of

Description : The carbon-based reduction method is NOT used for the extraction of

Last Answer : The carbon-based reduction method is NOT used for the extraction of A. Tin From `SnO_(2)` B. Iton from ... 3)` D. Mangnesium from `MgCO_(3).CaCO_(3)`

The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Description : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Last Answer : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore ... ` D. `CaO + SiO_(2) rarr CaSiO_(3)`

The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Description : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Last Answer : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore ... ` D. `CaO + SiO_(2) rarr CaSiO_(2)`

The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Description : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Last Answer : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore ... ` D. `CaO + SiO_(2) rarr CaSiO_(3)`

In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with

Description : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with

Last Answer : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with A. FeS B. CO C. `Cu_(2)S` D. `SO_(2)`

(A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts with its oxide to the give the metal

Description : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts with its oxide to the give the metal

Last Answer : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts ... . If (A) is incorrect but (R ) is correct

In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with

Description : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with

Last Answer : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with A. FeS B. CO C. `Cu_(2)S` D. `SO_(2)`

The correct sequence of steps involved in extraction of metal from its ore is a) removal of impurities, purify metal, reduction of ore b) purify metal, removal of impurities, reduction of metal ore . c) concentration of ore , refining of metal , reduction d) removal of impurities from ore , reduction of ore , refining of metal

Description : The correct sequence of steps involved in extraction of metal from its ore is a) removal of impurities, purify metal, reduction of ore b) purify metal, removal of impurities, reduction of metal ore . c ... of metal , reduction d) removal of impurities from ore , reduction of ore , refining of metal

Last Answer : d) removal of impurities from ore , reduction of ore , refining of metal

In the commercial electrochemical process for aluminium extraction, the electrolyte used is

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)`

In the commercial electrochemical process for aluminium extraction, the electrolyte used is

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)_(2)` is NaOH ... Al_(2)O_(3)` and `Al(OH)_(3)`

For reactions of metals to form their oxide one gram `O_(2)` molecule is used may be plotted graphically against temperature Select incorrect using gi

Description : For reactions of metals to form their oxide one gram `O_(2)` molecule is used may be plotted graphically against temperature Select incorrect using gi

Last Answer : For reactions of metals to form their oxide one gram `O_(2)` molecule is used may be plotted graphically ... rarr 2CO(g), DeltaG^(0)=x kJ//mol`

How many of the following metals can be extracted buy carbon reduction method ? Na,Al,Mg,Sn,Fe,Pb,Zn,Ca

Description : How many of the following metals can be extracted buy carbon reduction method ? Na,Al,Mg,Sn,Fe,Pb,Zn,Ca

Last Answer : How many of the following metals can be extracted buy carbon reduction method ? Na,Al,Mg,Sn,Fe,Pb,Zn,Ca

How many of the given metals can be obtained by carbon reduction in their extractive metallurgy

Description : How many of the given metals can be obtained by carbon reduction in their extractive metallurgy

Last Answer : How many of the given metals can be obtained by carbon reduction in their extractive metallurgy

Highly electropositive metals can not be extracted by carbon reduction process because these :

Description : Highly electropositive metals can not be extracted by carbon reduction process because these :

Last Answer : Highly electropositive metals can not be extracted by carbon reduction process because these : A. Metals ... D. Loss of metal is more by vaporisation

Statement-1: Auto reduction of ores is used for cinnabar, copper glance and Galena ores Statement-2:The sulphide ores of these metals react with their

Description : Statement-1: Auto reduction of ores is used for cinnabar, copper glance and Galena ores Statement-2:The sulphide ores of these metals react with their

Last Answer : Statement-1: Auto reduction of ores is used for cinnabar, copper glance and Galena ores Statement-2: ... Statement-1 is false but Statement -2 is true

In which of the following pair(s) the minerals are converted in to metals by self-reduction process?

Description : In which of the following pair(s) the minerals are converted in to metals by self-reduction process?

Last Answer : In which of the following pair(s) the minerals are converted in to metals by self-reduction process? A. `Cu_(2)S, ... `PbS, ZnS` D. `Ag_(2)S, Cu_(2)S`

Standard reduction potential of alkali metals have high negative values.

Description : Standard reduction potential of alkali metals have high negative values.

Last Answer : Explain : Standard reduction potential of alkali metals have high negative values.

Which of the following metals is NOT obtained by reduction using carbon? (1) Copper (2) Sodium (3) Iron (4) Zinc

Description : Which of the following metals is NOT obtained by reduction using carbon? (1) Copper (2) Sodium (3) Iron (4) Zinc

Last Answer : (2) Sodium Explanation: Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal.

Exposure to SO2 containing chimney gases results in the (A) Reduction in strength of leather & cloth (B) Acceleration of corrosion rates of metals (C) Increased drying & hardening time of paints (D) All (A), (B) and (C)

Description : Exposure to SO2 containing chimney gases results in the (A) Reduction in strength of leather & cloth (B) Acceleration of corrosion rates of metals (C) Increased drying & hardening time of paints (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Which of the following reactions involves neither oxidation nor reduction ?

Description : Which of the following reactions involves neither oxidation nor reduction ?

Last Answer : Which of the following reactions involves neither oxidation nor reduction ? A. `CrO_(4)^(2-)rarrCr_(2)O_(7)^(2-)` ... 2)O_(3)^(2-)rarrS_(4)O_(6)^(2-)`

Which of the following reduction reactions does not give an amine as product?

Description : Which of the following reduction reactions does not give an amine as product?

Last Answer : Which of the following reduction reactions does not give an amine as product? A. `R-NO_(2) underset(" ... (2)underset(Delta)overset(Zn//NH_(4)Cl)rarr`

A substance which participates readily in both acid-base and oxidation-reduction reactions is:

Description : A substance which participates readily in both acid-base and oxidation-reduction reactions is:

Last Answer : A substance which participates readily in both acid-base and oxidation-reduction reactions is: A. `Na_(2) CO_(3)` B ... KMnO_(4)` D. `H_(2)C_(2)O_(4)`

Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron metallurgy)?

Description : Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron metallurgy)?

Last Answer : Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron ... CO` D. `CO_(2)+C rarr 2CO`

Which of the following coenzyme takes part in oxidation-reduction reactions? (A) Pyridoxal phosphate (B) Lipoic acid (C) Thiamin diphosphate (D) None of these

Description : Which of the following coenzyme takes part in oxidation-reduction reactions? (A) Pyridoxal phosphate (B) Lipoic acid (C) Thiamin diphosphate (D) None of these

Last Answer : Answer : B

Coenzymes are required in which of the following reactions? (A) Oxidation-reduction (B) Transamination (C) Phosphorylation (D) All of these

Description : Coenzymes are required in which of the following reactions? (A) Oxidation-reduction (B) Transamination (C) Phosphorylation (D) All of these

Last Answer : Answer : D