Description : Pine oil and Cresylic acid are used as __________ in the froth floatation process. (A) Frother (B) Collector (C) Depressor (D) Conditioner
Last Answer : (A) Frother
Description : Xanthates are used in the froth floatation process as a/an (A) Conditioner (B) Frother (C) Collector (D) Activator
Last Answer : (C) Collector
Description : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :
Last Answer : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth ... ]` D. They cannot be separated by adding NaCN
Description : Froth floatation process for the concentration of sulphide ore is an illustration of the practical application of
Last Answer : Froth floatation process for the concentration of sulphide ore is an illustration of the practical ... B. absorption C. sedimentation D. cogulation
Description : In the froth floatation process for the purification of minerals the particles float because
Last Answer : In the froth floatation process for the purification of minerals the particles float because A. they ... by oil D. They bear an electrostatic charge.
Last Answer : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as ... _(4)]` D. both (1) and (2)
Description : The substance used as froth stablisers in froth floatation process is :
Last Answer : The substance used as froth stablisers in froth floatation process is : A. Fatty acids B. Aniline C. pine oil D. Xanthates
Description : In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by__________
Last Answer : In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by__________ A. ... C. using depressent D. using froth stablisers
Description : Which of the following statements is correct about the role of substances addedd in the froth floatation process?
Last Answer : Which of the following statements is correct about the role of substances addedd in the froth ... D. Froth stablisers decrease wettability of gangue.
Description : Froth floatation process used for the concentration of sulphide ore. Which of the following statements are correct (a) It is based on the difference i
Last Answer : Froth floatation process used for the concentration of sulphide ore. Which of the following statements are correct (a) ... . (a), (b) ( c) are correct
Last Answer : Froth floatation process for the concentration of sulphide ore is an illustration of the practical ... B. absorption C. sedimentation D. coagulateion
Description : The froth floatation process is used for the concentration of
Last Answer : The froth floatation process is used for the concentration of A. ore having low density ore ... high density D. ore having water soluble gangue
Description : The olive oil used in froth floatation process is called
Last Answer : The olive oil used in froth floatation process is called A. Frothing agent B. Lubricating agent C. Conditioning agent D. Both 1 and 2
Description : The ore that is concentrated by froth floatation process is
Last Answer : The ore that is concentrated by froth floatation process is A. Chalcopyrites B. Cryolite C. Cuprite D. Calamine
Description : The metallurgical process in which a metal is obtained in a fused state is called - (1) roasting (2) calcinations (3) smelting (4) froth floatation
Last Answer : (3) smelting Explanation: The metallurgical process in which a metal is obtained in a fused state is called smelting.
Description : The oil used in the froth floatation process is?
Last Answer : pine oil
Description : Pick out the correct statement. (A) Angle of repose is always greater than the angle of slide (B) A hopper is a small bin with a sloping bottom (C) A silo is a short height ... used as a 'modifying agent' (for activating or depressing the adsorption of filming agents) in froth floatation process
Last Answer : (B) A hopper is a small bin with a sloping bottom
Description : Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator? (A) Cresylic acid (B) Copper sulphate (C) Calcium carbonate (D) Sodium carbonate
Last Answer : (B) Copper sulphate
Description : What is the role of a stabilizer in froth floatation process?
Last Answer : Ans.: Chemical compounds like cresols and aniline which tend to stabilize the froth are called stabilizers.
Description : What is the role of collector in froth floatation process ?
Last Answer : Ans. Collector enhances non-wettability of the mineral particles.
Description : __________ is an ore concentrating metallurgical process involving a chemical change. (A) Electromagnetic separation (B) Froth floatation (C) Roasting (D) None of these
Last Answer : (C) Roasting
Description : Assertion : Sulphide ores are concentrated by Froth Floatation method. Reason : Cresols stabilise the froth in Froth Floatation method
Last Answer : Assertion : Sulphide ores are concentrated by Froth Floatation method. Reason : Cresols stabilise the froth in Froth Floatation method
Description : Froth floatation :
Last Answer : Froth floatation : A. Froth carries the mineral particles B. Froth carries gangue particles C. Froth ... by oils while gangue become wet by water.
Description : Which of the following ores are concentrated by froth floatation?
Last Answer : Which of the following ores are concentrated by froth floatation? A. haematite B. Galena C. Copper pyrites D. Magnetite
Description : Uranium is recovered from its ore (pitchblende) by (A) Froth floatation technique (B) Leaching with sulphuric acid (C) Smelting in a furnace (D) Dissolving in water
Last Answer : (B) Leaching with sulphuric acid
Description : Which of the following is the most suitable for cleaning of fine coal dust (
Last Answer : (D) Froth floatation
Description : In froth floatation, chemical agent added to cause air adherence is called (A) Collector (B) Frother (C) Modifier (D) Activato
Last Answer : (A) Collector
Description : Froth floatation is the most suitable for treating (A) Iron ores (B) Sulphide ores (C) Quartzite (D) None of these
Last Answer : (B) Sulphide ores
Description : Gold ore concentration is mostly done using (A) Jigging (B) Tabling (C) Froth floatation (D) Elutriation
Last Answer : (B) Tabling
Description : Pine oil used in froth floatation technique acts as a/an (A) Collector (B) Modifier (C) Frother
Last Answer : (C) Frother
Description : For benefication of iron ore, the most commonly used method is (A) Flocculation (B) Froth floatation (C) Jigging & tabling (D) None of these
Last Answer : (C) Jigging & tabling
Description : There is practically no alternative/competitor to __________ in the beneficiation treatment of sulphide ores. (A) Classification (B) Tabling (C) Jigging (D) Froth floatation
Description : Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called (A) Classification (B) Froth floatation (C) Thickening (D) Clarification
Last Answer : (A) Classification
Description : Froth floatation is used for (A) Washing fine coal dust (< 0.5 mm size) (B) Washing lump coal (> 80 mm size) (C) Removing ash from the coal based on difference in specific gravity of coal and ash
Last Answer : (A) Washing fine coal dust (< 0.5 mm size)
Description : Concentration of sulphide ores is done usually by (A) Roasting (B) Smelting (C) Froth floatation (D) Electromagnetic separation
Last Answer : (C) Froth floatation
Description : Iron ore hematite is concentrated using (A) Electromagnetic separation mainly (B) Gravity separation (C) Froth floatation (D) Roasting
Last Answer : (B) Gravity separation
Description : Ore concentration by froth floatation utilises the __________ of oreparticles. (A) Density difference (B) Wetting characteristics (C) Terminal velocities (D) None of these
Last Answer : (B) Wetting characteristics
Description : Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following ... A) Cresylic acid (B) Xanthaies (C) Pine oil (D) All 'a' 'b' & 'c'
Last Answer : (B) Xanthaies
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 : `NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` minerals are expected because `:`
Last Answer : `NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` ... D. Sillccious impurities settle down on the bottom.
Description : Which of the following is used for the seperation of ZnS and PbS during the froth flotation process?
Last Answer : Which of the following is used for the seperation of ZnS and PbS during the froth flotation process? A. KCl B. KCN C. `NH_(4)NO_(3)` D. None of these
Description : The collecting agent in froth floating process is
Last Answer : The collecting agent in froth floating process is A. Sodium ethyl xanthate B. `CuSO_(4)` C. Lime D. Water
Description : Froth Flotation process is used for the metallurgy of
Last Answer : Sulphide ore
Description : Statement -I In forth floatation process sodium ethyl xanthale is used as collector. Statemant -2Sulphide oress are waer soluble .
Last Answer : Statement -I In forth floatation process sodium ethyl xanthale is used as collector. Statemant -2Sulphide oress are waer soluble .
Description : Which one of the following ores is best concentrated by froth flotation method:
Last Answer : Which one of the following ores is best concentrated by froth flotation method: A. magnetite B. cassiterite C. galena D. malachite.
Description : Froth flatiation
Last Answer : Froth flatiation A. is a physical method of separation mineral from gangue. B. is method to concentrate ... a method in which ore sink to the bottom
Last Answer : Which one of the following ores is best concentrated by froth flotation method: A. KCN B. NaCN C. Sodium ethyl Xanthalate D. Copper sulphate
Description : IBM 1401 is the first computer to enter in Nepal. It belonged to A) First Generation B) Second Generation C) Third Generation D) Froth Generation
Last Answer : Answer : B
Description : How does NaCN act as a depressant in preventing ZnS from forming the froth ?
Last Answer : Ans. NaCN forms a layer of zinc complex, Na2 [Zn (CN)4 ] on the surface of ZnS and thereby prevents it from the formation of froth.