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 : 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 : 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 : The study of metals and the overall process by which metals are extracted from its ores are called?
Last Answer : Metallurgy
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 : 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
Description : How the most electropositive metals are isolated from their ores ?
Last Answer : Ans. The most electropositive metals are isolated from their ores by electrolysis of fused ionic salts.
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
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
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
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
Description : Sulfide ores are common for the metals.
Last Answer : Sulfide ores are common for the metals. A. Ag,Cuand Pb B. Ag ,Cu and Sn C. Ag,Mg and Pb D. Al.Cu and Pb
Description : Statement-I : All the ores are mineral Statement-II : Most of the ores contains metals in combined state
Last Answer : Statement-I : All the ores are mineral Statement-II : Most of the ores contains metals in combined state
Description : Copper is the most noble of first row transition metals and occurs in small deposits in serveral countries. Ores of copper include chalcanthite `(CuSO
Last Answer : Copper is the most noble of first row transition metals and occurs in small deposits in serveral ... -reduction. Iron is removed from chalcopyrite as.
Last Answer : Copper is the most noble of first row transition metals and occurs in small deposits in ... self-reduction. Partial roasting of chalcopyrite produces
Description : Is it true that many metals are extracted from ores that contain sulfide minerals?
Last Answer : Feel Free to Answer
Description : Which scientific method is used for the production/extraction of Noble metals?
Last Answer : Cyanide process
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 : 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 : 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 : 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 : 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
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 : 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 : 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)
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.
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.
Description : By which process copper is refined ------? A. Roasting (Answer) B. Oxidation C. Zone Refining D. Electrolysis
Last Answer : A. Roasting (Answer)
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
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
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
Description : Fire refining process is employed in case of (A) Tin (B) Copper (C) Zinc (D) Aluminium
Last Answer : (B) Copper
Description : The first step in the refining process of many oils is ____. a. degumming c. bleaching b. refining d. winterization
Last Answer : a. degumming
Description : Describe the process of purification of aluminium by electrolytic refining with the help of neat, labelled diagram.
Last Answer : Process: 1) The electrolytic cell consists of an iron tank lined at the bottom with carbon, which serve as anode. A number of graphite rods serve as cathode. 2) The cell is filled with ... . Crude or impure Al is added to the bottom layer from time to time. The process is thus continued.
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.
Description : The strong heating of coal in absence of air is known as _______. a) destructive distillation b)refining c)combustion d)burning
Last Answer : a) destructive distillation
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 : Calcination
Description : The process of purifying Sulphide ores?
Last Answer : Froth Flotation process
Description : Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference in the nature of wettibility of different ore
Last Answer : Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference ... -1 is false but Statement -2 is true
Description : To which of the following ores , calcination process is not applicable
Last Answer : To which of the following ores , calcination process is not applicable A. Zns B. `Al_(2)O_(3)2H_(2)O` C. `CuCO_(3).Cu(OH)_(2)` D. `CaCO_(3)`
Description : For the metallurgical process of which of the ores calcined ore can be reduced by carbon?
Last Answer : For the metallurgical process of which of the ores calcined ore can be reduced by carbon? A. haematite B. Calamine C. Iron pyrites D. Sphalerite
Description : Generally sulphide ores are concentrated by following process
Last Answer : Generally sulphide ores are concentrated by following process A. Hand picking B. Washing with water C. Leaching D. Froth floatation