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.
Description : (A) All minerals are ores (R ) Ores are minerals from which metal can be extracted convenitly and economically
Last Answer : (A) All minerals are ores (R ) Ores are minerals from which metal can be extracted convenitly and ... If (A) is incorrect but (R ) is correct
Description : Is it true that many metals are extracted from ores that contain sulfide minerals?
Last Answer : Feel Free to Answer
Description : The study of metals and the overall process by which metals are extracted from its ores are called?
Last Answer : Metallurgy
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 : The process of extraction of metals from their ores; and then refining them for use is known as?
Last Answer : metallurgy
Description : . A mineral is termed as 'ore', if (A) A metal can be economically extracted from it (B) It contains ≥ 40% metal (C) The metal present in it is costly (D) All (A), (B) and (C)
Last Answer : (A) A metal can be economically extracted from it
Description : Assertion: `Ag` and `Au` are extracted by leaching the ores with a dilute solution of `NaCN`. Reason: Impurities associated with these ores dissolve i
Last Answer : Assertion: `Ag` and `Au` are extracted by leaching the ores with a dilute solution of `NaCN`. ... . Statement-1 is false but Statement -2 is true
Description : Heat sensitive materials with very high latent heat of vaporisation may be economically separated using (A) Liquid extraction (B) Distillation (C) Evaporation (D) Absorption
Last Answer : (A) Liquid extraction
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 : Acetic acid will be most economically separated from a dilute solution of acetic acid in water by (A) Solvent extraction (B) Continuous distillation (C) Evaporation (D) Absorption
Last Answer : (A) Solvent extraction
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 : Why is extraction of aluminium not commercially viable by using reducing agents like coke? OR Coke is used in the extraction of iron but not in the extraction of aluminium. Why? OR Aluminium cannot be extracted by heating bauxite and coke. Why?
Last Answer : Oxygen of aluminium oxide cannot be easily taken away by reducing agents like coke.
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 : Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be extracted by treating the crushe
Last Answer : Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed ... hydrometallurgical extraction D. purification of metal.
Last Answer : Metallic gold ferquently is found is aluminosilicate rocks and it is finely dispersed among other minerals. It may be ... agent. D. (A) and ( C) both
Description : Metallic gold frequently is found is aluminosilicate rocks and it is finely dispersed among other minerals it may be extracted by treating the crushed
Last Answer : Metallic gold frequently is found is aluminosilicate rocks and it is finely dispersed among other minerals it may be ... ) rarr Zn[(CN)_(4)]^(-)`
Description : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides can be easily reduced .
Last Answer : Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides ... -1 : is false , statement-2 : is true
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 : 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 : Whole circle bearing of a line is preferred to a quadrantal bearing merely because (A) Bearing is not completely specified by an angle (B) Bearing is completely specified by an angle ... different in different quadrants (D) Its Trigonometrical values may be extracted from ordinary tables easily
Last Answer : (B) Bearing is completely specified by an angle
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
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
Description : Metals which can be extracted by smelting process are :
Last Answer : Metals which can be extracted by smelting process are : A. Zns B. Al C. Pb D. Fe
Description : Metals extracted from sea water?
Last Answer : Magnesium and sodium
Description : Which metals are generally extracted by electrolyte process? Which positions these metals generally occupy in the periodic table?
Last Answer : Ans. : Electrolytic process is used for the extraction of active metals like Na, Ca, Mg, K, Al etc. where all other methods fail. Except Al and few other metals, these metals belongs to S-block elements of periodic table.
Description : Explain three factors that make minerals extraction commercially viable. -SST 10th
Last Answer : (i) The mineral content of the ore must be in sufficient quantity. (ii) The type of formation or structure determine the relative ease with which minerals ores are extracted. (iii) The cost of extraction of the minerals.
Description : What is an important condition to make the extraction of minerals commercially viable? -SST 10th
Last Answer : The mineral context of the ore must be in sufficient concentration.
Description : What are some negative impact of extraction of minerals from Canadian shield?
Description : Which of the following leads to earthquakes: a) Movement of plates b) Nuclear explosion c) Extraction of minerals d) All of the above
Last Answer : d) All of the above
Description : AS -10 (Accounting Standard on Fixed Assets) does not deal with accounting for the following items to which special considerations apply A. Forests, plantations and similar regenerative natural ... resources C. Expenditure on real estate development and livestock D. None of the above
Last Answer : D. None of the above
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 : The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reaction
Last Answer : The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reaction A. ` ... D. `2Cu_(2)O+FeSto4Cu+Fe+SO_(2)`
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 : If businesses decide to keep a mandatory mask use in place after the Government takes theirs down will you respect it?
Last Answer : Yep Better yet, I don’t need shops or companies to make it mandatory, I’ll keep on wearing it there until I personally feel like I can do it without again. I must say that I’ve liked it.
Description : In cases of disagreement do you unfriend a person,or simply set your privacy settings so they can't see your posts and you can't see theirs unless you go to their page?
Last Answer : Neither. My Friendbook page is largely for sharing petitions and issues, and I haven't unfriended anyone for disagreeing. That's how I get to keep knowing about the opinion that Trump is a god-sent ... our secret space defense fleet already hiding behind the Moon (or is it Mars or the Sun?).
Description : What would you do if someone volunteered to have a barbque at your house, then proceeded to take over the kitchen like it was theirs?
Last Answer : Probably let it ride ,but after that I would distance myself from the person as best I could.
Description : What are some ideas to get my two dogs from running up the hill in the back yard and barking at the other dogs when the neighbors let theirs out?
Last Answer : I recommend watching a couple of episodes of “The Dog Whisperer”.
Description : Are our pets better at learning our body language than we are at learning theirs?
Last Answer : No. I would cite anecdotal evidence ad nauseum… but just no.
Description : Did you, like me, fall asleep to the tunes of Simon and Garfunkel? Favourite song of theirs?
Last Answer : Fragile by Sting
Description : If a friend of yours revealed a dark disturbing secret of theirs, what would you do?
Last Answer : answer:Been there, done that. I offered support.
Description : Not being close to your parents, your fault or theirs?
Last Answer : The personalities of the people involved (as described by genetics).
Description : Who is your favourite photographer and what photograph of theirs do you love the most and why?
Last Answer : I don’t really have a single photographer or single image. One of my favorites is Ansel Adams, whose images of the West that I love really touch my heart. Have you ever seen his Moon and Half Dome?
Description : Why do some people find it so hard to accept a belief other than theirs?
Last Answer : I think that if people find out they’re wrong, it overwhelms them. A good defense is a strong offense.
Description : Who is your favorite visual artist? And what is your favorite piece of theirs?
Last Answer : That's like asking what my favorite color is. There are so many to choose from and so many styles. It changes with my mood. There are living artists that I collect, and there are those pieces ... appreciate Muro in a museum, but it makes me uncomfortable in my house. It all really depends I guess.
Description : Two women sit staring and glaring at each other across a small table. Although the two women don't appear to be friendly toward each other, they do eventually hold each other's hands. A man approaches, puts ... is the word the man shouts to the women, and what in the world is going on here? -Riddles
Last Answer : The word the man shouts to the women is, 'Go!' This is the way most women's arm wrestling competitions start, and hopefully the wrist straps, to keep their hands from slipping apart, won't have to be used.