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
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
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
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)
Description : In which of the following method of purification metal is converted to its volatile compound which is decomposed to give pure metal?
Last Answer : In which of the following method of purification metal is converted to its volatile compound ... Heating with iodine C. Liquidation D. Distillation
Description : Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore? (A) High fusibility & fluidity (B) High thermal conductivity (C) Low density (D) High chemical activity
Last Answer : B) High thermal conductivity
Description : “Democracy stands much superior to any other froms of government in promoting dignity and freedom of the individual.” Explain. -SST 10th
Last Answer : Democracy supports dignity and freedom of the citizens. Every man wants to get respect from fellow persons in the society. A lot of conflicts take place among human beings because ... has strengthened the claims of the disadvantaged and discriminated castes for equal status and equal opportunity.
Description : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of
Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of ... B. Oxgen C. `CO_(2)` D. Argin
Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the ... nitrogen B. oxygen C. carbon dioxide D. argon
Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the ... Nitrogen B. Oxygen C. Carbon dioxide D. Argon
Description : Non-volatile heavy metals in kiln are fixed into ____ a) Clinker’s crystalline structure b) Fumes c) Solid lump d) Slag
Last Answer : Clinker’s crystalline structure
Description : Consider the following statements: 1. Mercury metal exists as a liquid at room temperature. 2. The property of metals by which they can be beaten into thin sheets is called malleability 3. Neutral fats such as butter and vegetable oils ... b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only
Last Answer : Ans:(d)
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 ?
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 ... + 2CuO rarr 3Cu + SO_(2) uparrow `
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 .
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.
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)`
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)`
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)`
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)`
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)`
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
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
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)
Description : The process of extraction of metals from their ores; and then refining them for use is known as?
Last Answer : metallurgy
Description : Which scientific method is used for the production/extraction of Noble metals?
Last Answer : Cyanide process
Description : Pick out the correct statement. (A) If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container, the temperature of the liquid will increase (B) A ... compound is defined as the heat of reaction leading to the formation of the compound from its reactants
Last Answer : (D) The heat of formation of a compound is defined as the heat of reaction leading to the formation of the compound from its reactants
Description : `Ti` can be purified by Van Arkel process. `TiI_(4)` is a volatile compound which decomposes at a high temperature.
Last Answer : `Ti` can be purified by Van Arkel process. `TiI_(4)` is a volatile compound which decomposes at a ... D. Statement-1 is false but Statement -2 is true
Description : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.
Last Answer : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.
Description : The property due to which the resistance of some metal or compound vanishes under certain conditions is (A) Semi conductivity. (B) Super conductivity. (C) Curie point. (D) Magnetostriction.
Last Answer : (B) Super conductivity.
Description : Pick out the wrong statement. (A) Critical moisture content is not a property of the material itself (B) A sharp increase in pressure drop gives an indication of the flooding in a ... unity (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum
Last Answer : (D) Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum
Description : Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m2 and the ... extraction achieved in the unit is (A) 25% (B) 50% (C) 70% (D) 90%
Last Answer : (B) 50%
Description : A 65 years-old patient needs extraction of 44; he has taken insulin in the morning. What preoperative advice you should give: A. Take more sugar B. Maintain normal diet C. Antibiotic 2 hours before D. Medication increases preoperatively
Last Answer : B. Maintain normal diet
Description : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of NaCN in presence of air. Statement-2:This is an
Last Answer : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of ... -1 is false but Statement -2 is true
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)`
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
Description : Which of the following oxides is reduced by water gas to obtain the metal during its extraction?
Last Answer : Which of the following oxides is reduced by water gas to obtain the metal during its extraction? A. `Fe_(2)O_(3)` B. NiO C. ZnO D. `WO_(3)`
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
Description : What are the steps of metal extraction ?
Last Answer : Metal extraction steps are five.
Last Answer : The method by which metal is collected from ore is called metal extraction
Description : Statement-I : In the extraction of Ag, the complex `Na[Ag(CN)_(2)]` is reacted with `Zn` Statement-II : `Zn` is transition metal according to electron
Last Answer : Statement-I : In the extraction of Ag, the complex `Na[Ag(CN)_(2)]` is reacted with `Zn` ... . Statement-1 : is false , statement-2 : is true
Description : In the extraction of aluminium metal , one of the process is summarised as follows : Which of the following entrie correctly summarises reagents , ele
Last Answer : In the extraction of aluminium metal , one of the process is summarised as follows : Which of the following ... ), Na_(3)AlF_(6) , "Cathode"):}`
Description : In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite (ii) Malachite (iii) Calcite (iv) Copper pyrities
Last Answer : In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite ... Siderite (viii) Iron pyrite (ix) Ar gentite
Description : During the extraction of Ag and using a KCN solution and Zn, cyanide ions and Zn react with metal ion as respectively
Last Answer : During the extraction of Ag and using a KCN solution and Zn, cyanide ions and Zn react with metal ... acid C. A reducing agent D. A complexing agent
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`
Description : Extraction of gold and silver involves leaching the metal with `CN^(-)` ion. The metal is recovered by _______
Last Answer : Extraction of gold and silver involves leaching the metal with `CN^(-)` ion. The metal ... by roasting D. thermal decomposition of metal complex
Description : The extraction of metal from the ore is
Last Answer : The extraction of metal from the ore is A. an oxidation process B. a reduction process C. a hydration process D. a neutratlisaiton process
Description : The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag. (A) Fluidity (B) Basicity (C) Acidity (D) Viscosity
Last Answer : Option A