Zone refining is a method to obtain

Zone refining is a method to obtain
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Zone refining is a method to obtain A. very high temperature B. ultra pure Al C. ultra pure metals D. ultra pure oxides
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Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.

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

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

The method of zone refining of metals is based on the principle of :

Description : The method of zone refining of metals is based on the principle of :

Last Answer : The method of zone refining of metals is based on the principle of : A. Greater mobility of the ... the impurity in the molten state than in the solid

Zone refining method is used for refining

Description : Zone refining method is used for refining

Last Answer : Zone refining method is used for refining A. Al B. Ge C. Cu D. Fe

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

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

Last Answer : The apparatus used for zone refining consists of a circular heater fitted around the rod of impure metal at one end. The circular heater is slowly moved to the other end. At the heated zone, ... in solid metal passes into the adjacent molten part. A metal refined by zone refining is germanium.

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

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

Last Answer : Metals of high purity are obtained by zone refining. Impurities are more soluble in melt in pure ... Statement-1 is false but Statement -2 is true

Zone refining is based on the principle of

Description : Zone refining is based on the principle of

Last Answer : Zone refining is based on the principle of A. fractional distillation B. fractional ... C. partition coefficent D. chromatographic seperation

Zone refining is based on the principle that

Description : Zone refining is based on the principle that

Last Answer : Zone refining is based on the principle that A. impurities of low boiling metals can be ... volatile compound can be decomppose in pure metal.

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

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

Last Answer : (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 concentrate is treated with very hot air. This process is generally applied to sulphide minerals.

The ultrapure metal is obtained by - (1) Calcination (2) Sublimation (3) zone refining (4) None of these

Description : The ultrapure metal is obtained by - (1) Calcination (2) Sublimation (3) zone refining (4) None of these

Last Answer : (3) zone refining Explanation: The principal stages in the production of ultrapure metals are the preparation of pure chemical compounds, the reduction of the compounds to the elementary state and further purification.

Zone refining is used for the purification of?

Description : Zone refining is used for the purification of?

Last Answer : Ge

What is meant by zone refining or fractional crystallization?

Description : What is meant by zone refining or fractional crystallization?

Last Answer : Zone refining is a technique of obtaining ultra pure metal. It is based on the principle of differences in solubility of impurities in liquid and solid states of the metal.

What is the Principle of Zone refining ?

Description : What is the Principle of Zone refining ?

Last Answer : Ans. : When the molten solution of an impure metal is allowed to cool, the pure metal crystallizes out while the impurities remains in the solution.

By which process copper is refined ------? A. Roasting (Answer) B. Oxidation C. Zone Refining D. Electrolysis

Description : By which process copper is refined ------? A. Roasting (Answer) B. Oxidation C. Zone Refining D. Electrolysis

Last Answer : A. Roasting (Answer)

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

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

Last Answer : roasting

Ultrapure elements are obtained in the following method of mental refining

Description : Ultrapure elements are obtained in the following method of mental refining

Last Answer : Ultrapure elements are obtained in the following method of mental refining A. Electrolysis B. Poling C. Liquation D. Distallation

How do I use proactiv's repairing lotion and refining mask?

Description : How do I use proactiv's repairing lotion and refining mask?

Last Answer : Wash your face with the cleanser and then gently wipe with the toner. Then the Repairing Lotion goes on. The Refining Mask is for blemishes. Scars are a whole other matter.

Where is India's first oil refining plant located? -General Knowledge

Description : Where is India's first oil refining plant located? -General Knowledge

Last Answer : Digboi Refinery Digboi Refinery - IndianOil The small town of Digboi in the remote north eastern corner of the country is the birth place of the Oil Industry in India. Digboi Refinery, commissioned on ... , is India's oldest operating refinery and one of the oldest operating refineries in the world.

Is analog computer used for petrol refining ?

Description : Is analog computer used for petrol refining ?

Last Answer : Yes,analog computer is used for petrol refining.

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

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

Last Answer : Copper is purifed by electrolaytic refining of blister copper ,The correct statement (s) about this ... at cathode D. Impurites settle as anode -mud

Statement - 1 : `PbSiF_(6) + H_(2) SiF_(6)` + gelatine is taken as electrolyte in electrolytic refining of lead . Statement -2 : Discharge potential o

Description : Statement - 1 : `PbSiF_(6) + H_(2) SiF_(6)` + gelatine is taken as electrolyte in electrolytic refining of lead . Statement -2 : Discharge potential o

Last Answer : Statement - 1 : `PbSiF_(6) + H_(2) SiF_(6)` + gelatine is taken as electrolyte in electrolytic ... Statement-1 : is false , statement-2 : is true

How many of the following refining processes are correctly matched with their element ?

Description : How many of the following refining processes are correctly matched with their element ?

Last Answer : How many of the following refining processes are correctly matched with their element ?

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

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

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

Last Answer : Which of the following common element(s) is/are present in the anode mud in elctrolytic refining of ... A. Selenium B. Tellurium C. Silver D. Gold

Which one of the following is true in electrolytic refining ?

Description : Which one of the following is true in electrolytic refining ?

Last Answer : Which one of the following is true in electrolytic refining ? A. impure metal is made cathode B. ... as anode D. both electrodes must be pure metal

Which is incorrectly matched for refining of element?

Description : Which is incorrectly matched for refining of element?

Last Answer : Which is incorrectly matched for refining of element? A. Si, Ge from impuritie` implies` zone ... Al from impurities Cu, Fe `implies` hoop method

Elecyroltic refining is used to purify which of the following metals?

Description : Elecyroltic refining is used to purify which of the following metals?

Last Answer : Elecyroltic refining is used to purify which of the following metals? A. Cu and Zn B. Ge and Si C. Zr and Ti D. Zn and Hg

Which computer used for petrol refining?

Description : Which computer used for petrol refining?

Last Answer : Wediki

Match the following: A. Salem 1. Antibiotics B. Pimpri 2. Petroleum refining C. Perambur 3. Alloy steel D: Bongaigaon 4. Railway coaches A B C D (a) 3 1 4 2 (b) 4 1 3 2 (c) 3 2 1 4 (d) 1 2 4 3

Description : Match the following: A. Salem 1. Antibiotics B. Pimpri 2. Petroleum refining C. Perambur 3. Alloy steel D: Bongaigaon 4. Railway coaches A B C D (a) 3 1 4 2 (b) 4 1 3 2 (c) 3 2 1 4 (d) 1 2 4 3

Last Answer : Ans: (a)

The molecular structure of the straight-run gasoline is changed by a) reforming b) refining c) cracking d) boiling

Description : The molecular structure of the straight-run gasoline is changed by a) reforming b) refining c) cracking d) boiling

Last Answer : Answer: a Explanation: The molecular structure of the straight-run gasoline is changed by reforming and hydrocarbons are decomposed into smaller hydrocarbons by cracking.

Hydrocarbons are decomposed into smaller hydrocarbons by a) reforming b) refining c) cracking d) polymerization

Description : Hydrocarbons are decomposed into smaller hydrocarbons by a) reforming b) refining c) cracking d) polymerization

Last Answer : Answer: c Explanation: Hydrocarbons are decomposed into smaller hydrocarbons by cracking while the molecular structure of the straight-run gasoline is changed by reforming.

Consider the following processes: 1. Evaporation 2. Fractional distillation 3. Distillation 4. Filtration The process(es) involved in the refining of crude oil is/ are: (a) 3 only (b) 2 and 3 (c) 3 only (d) 1 only

Description : Consider the following processes: 1. Evaporation 2. Fractional distillation 3. Distillation 4. Filtration The process(es) involved in the refining of crude oil is/ are: (a) 3 only (b) 2 and 3 (c) 3 only (d) 1 only

Last Answer : Ans:(b)

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.

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

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

Last Answer : (2) Calcination Explanation: Calcination involves simple decomposition of ore on heating below its melting point usually in absence of air to produce new compounds having higher percentage of ... as removing the moisture, organic matter and volatile impurities. Calcination makes the ore porous.

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

During electro refining, Pure Metal is collected at

Description : During electro refining, Pure Metal is collected at

Last Answer : Cathode

Petroleum coke is used mainly in the (A) Discoloration of yellow glycerine (B) Sugar refining (C) Manufacture of carbon electrode (D) Blast furnace for reduction of iron ore

Description : Petroleum coke is used mainly in the (A) Discoloration of yellow glycerine (B) Sugar refining (C) Manufacture of carbon electrode (D) Blast furnace for reduction of iron ore

Last Answer : (C) Manufacture of carbon electrode

. __________ is not an important refinery process for upgrading the quality of lubricating oil.(A) Deoiling (B) Solvent refining (C) Clay treatment (D) Hydro-treatment

Description : . __________ is not an important refinery process for upgrading the quality of lubricating oil. (A) Deoiling (B) Solvent refining (C) Clay treatment (D) Hydro-treatment

Last Answer : (A) Deoiling

The colour of gasoline is an indication of its (A) Octane number (B) Lead susceptibility (C) Gum forming tendency & thoroughness of refining (D) None of these

Description : The colour of gasoline is an indication of its (A) Octane number (B) Lead susceptibility (C) Gum forming tendency & thoroughness of refining (D) None of these

Last Answer : (C) Gum forming tendency & thoroughness of refining

In petroleum refining, the process used for conversion of hydrocarbons to aromatics is (A) Catalytic cracking (B) Catalytic reforming (C) Hydrotreating (D) Alkylation

Description : In petroleum refining, the process used for conversion of hydrocarbons to aromatics is (A) Catalytic cracking (B) Catalytic reforming (C) Hydrotreating (D) Alkylation

Last Answer : (B) Catalytic reforming

Maximum use of petroleum coke is in (A) Adsorption refining operation (B) Fuel gas manufacture (C) Carbon electrode manufacture (D) Iron ore reduction

Description : Maximum use of petroleum coke is in (A) Adsorption refining operation (B) Fuel gas manufacture (C) Carbon electrode manufacture (D) Iron ore reduction

Last Answer : (C) Carbon electrode manufacture

Briefly explain the electrolytic refining of copper.

Description : Briefly explain the electrolytic refining of copper.

Last Answer : Copper is purified by electrolytic refining. The apparatus consists of an electrolytic tank containing copper sulphate solution as electrolyte. A set of thick blocks of impure copper is made anode ... anode becomes thinner and pure cathode becomes thicker. The impurities collect at the bottom.

What is electrolytic refining?

Description : What is electrolytic refining?

Last Answer : Electrolytic refining is a technique of ultra refining of metal. In this method, impure metal is taken as anode and pure metal are taken as cathode. Electric current is passed through the electrolyte to obtain pure metal at the cathode.

Name the process by which the refining of aluminium is done. Name the material used for the process.

Description : Name the process by which the refining of aluminium is done. Name the material used for the process.

Last Answer : Aluminium is refined by electrolytic refining. Carbon lining acts as the cathode and the graphite rods act as anode.

Which of the following adsorbent is used in the refining of sugar? (A) Bone charcoal (B) Wood charcoal (C) Silica gel (D) Activated clay

Description : Which of the following adsorbent is used in the refining of sugar? (A) Bone charcoal (B) Wood charcoal (C) Silica gel (D) Activated clay

Last Answer : (A) Bone charcoal

Pick out the correct statement. (A) Dialysis process is used for the production of fresh water from brine (B) Electrodialysis is used in the manufacture of NaOH (C) Electrodialysis is used for the refining/purification of petrol (D) Both (B) and (C)

Description : Pick out the correct statement. (A) Dialysis process is used for the production of fresh water from brine (B) Electrodialysis is used in the manufacture of NaOH (C) Electrodialysis is used for the refining/purification of petrol (D) Both (B) and (C)

Last Answer : (B) Electrodialysis is used in the manufacture of NaOH

Flash distillation is (A) Same as differential distillation (B) Used for multi-component systems like crude refining (C) Same as simple distillation (D) Most useful for handling binary systems

Description : Flash distillation is (A) Same as differential distillation (B) Used for multi-component systems like crude refining (C) Same as simple distillation (D) Most useful for handling binary systems

Last Answer : (B) Used for multi-component systems like crude refining

Large scale usage of flash distillation is practised in (A) Soap manufacturing (B) Ammonia synthesis plant (C) Polymerisation industry (D) Petroleum refining

Description : Large scale usage of flash distillation is practised in (A) Soap manufacturing (B) Ammonia synthesis plant (C) Polymerisation industry (D) Petroleum refining

Last Answer : (D) Petroleum refining

Which approach is used for refining a very general rule through ILP? a) Top-down approach b) Bottom-up approach c) Both Top-down & Bottom-up approach d) None of the mentioned

Description : Which approach is used for refining a very general rule through ILP? a) Top-down approach b) Bottom-up approach c) Both Top-down & Bottom-up approach d) None of the mentioned

Last Answer : a) Top-down approach

One of the steps during refining of cane sugar consists of addition ofhydrated lime to the sugar syrup followed by carbonation of the resultingsolution. The purpose of this step is to(A) Adjust the pH of the syrup(B) Remove the coloring matter from the syrup(C) Reduce the viscosity of the syrup(D) Improve the rate of crystallisation of sugar

Description : One of the steps during refining of cane sugar consists of addition ofhydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to (A) Adjust ... (C) Reduce the viscosity of the syrup (D) Improve the rate of crystallisation of sugar

Last Answer : (A) Adjust the pH of the syrup