Define the terms 1) Flux 2) Slag.

1 Answer

Answer :

Flux: ‘A substance which is used to remove the gangue from ore is called flux’. 

Slag: A fusible chemical compound formed by combination of the added flux and the gangue present in the ore.

Related questions

Description : The compound of a metal found in nature is called - (1) Mineral (2) Ore (3) Flux (4) Slag

Last Answer : (1) Mineral Explanation: Metals are an integral part of our planet and are found in almost all rocks and soils. Most metals form compounds called minerals, which are naturally occurring, inorganic solids with regular chemical compositions and crystal structures.

Description : Flux addition during smelting of ore is done to (A) Remove impurities/gangue (B) Enhance rate of reaction (C) Accelerate reduction of ore (D) Separate slag from metal

Last Answer : (A) Remove impurities/gangue

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

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

Description : Impurities in metal ores are called: w) flux x) gangue (pron: gang) y) slag z) sediments

Last Answer : ANSWER: X -- GANGUE

Description : Which of the following refers to an easily melted product of the reaction between the flux and the impurities of an ore? w) slag x) slurry y) slug z) none of the above

Last Answer : ANSWER: W -- SLAG

Description : Define polymerization. Explain addition polymerization with at least one example.

Last Answer : Polymerization: - The process in which a large number of small molecules (monomers) linking together to form a large molecule (polymer) under specific conditions of temperature, pressure & catalyst is ... catalyst. iv) No byproduct is obtained. v) It yields polymer having linear chain structure.

Description : Define : i) Atomic number ii) Atomic mass number iii) Energy level iv) Sub energy level

Last Answer : i) Atomic number: It is defined as; the number of protons present in the nucleus, which exactly balances the number of electrons present in the extra nuclear part. ii) Atomic mass number: It ... : The close grouping of number of energy levels in the main energy level is called sub energy level.

Description : Define concentration of ore. Name different methods of concentration.

Last Answer : Concentration of ore: The concentration of ore means the removal of gangue or matrix from crushed ore. Methods: i) Gravity separation ii) Electromagnetic separation iii) Froth floatation iv) Calcination v) Roasting

Description : Define each of following terms of illumination — lux, lumen, luminous flux, illumination.

Last Answer : i) Lux :- It is unit of illumination and it is defined as luminous flux falling per unit area  ii) Lumen: It is defined as the luminous flux emitted by a source of one candle power per unit ... the given surface on the working plane. The unit of illumination is lumens/m2 OR lumens/m2 = 1 Lux

Description : Define the terms: (i) Lamp efficiency (ii) Luminous flux (iii) Luminaire (iv) Colour Rendering Index. 

Last Answer : i) Lamp efficiency or luminous efficiency: It is the ratio of luminous flux emitted by a lamp to the power consumed by the lamp. It is a reflection of efficiency of energy conservation ... of surfaces illuminated by a given source compare to those of the same surface under reference illuminant.

Description : Define the following terms and state their units: (i) Luminous intensity, (ii) Luminous flux

Last Answer : i) Luminous intensity: This is defined as the luminous flux emitted into a solid angle of space in a specific direction. Its unit is the candela.  OR  The luminous flux per unit solid angle ( ... energy radiated by the light source in all direction. The unit of luminous flux is lumen (lm) 

Description : Define the following terms: i) Magnetic flux density, ii) Reluctance, iii) Magneto-motive force, iv) Permeance.

Last Answer : (i) Magnetic flux density (B): It is the magnetic flux per unit area measured at right angles to the flux path. (Its unit is weber/m2 or tesla).  (ii) Reluctance: It is the ... flux to set up through it and it is reciprocal of reluctance. Permeance = 1/ Reluctance. Unit: weber/ampere.

Description : Write the properties and applications of thermocole.

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Description : Name and describe the process which increases the stiffness of rubber.

Last Answer : Name: Vulcanization process is used to increase stiffness of rubber. Explanation: The process which involves addition of Sulphur or H2S to crude (raw) natural rubber at high temperature and ... in the rubber molecule of different rubber springs. Chemical reaction (Mechanism):

Description : Describe with labeled diagram the process of electroplating of silver.

Last Answer : 1. Electroplating of silver on iron - spoon is carried out in a rectangular steel tank. 2. Iron spoon, which is to be electroplated, is cleaned by boiling with caustic soda in order ... spoon gets plated with silver. Silver anode gets slowly dissolve in solution by giving Ag+ ions. 

Description : Write drawback of natural rubber. 

Last Answer : Drawbacks of natural rubber: 1. It has low tensile strength. 2. It is too weak to be used in heavy duty operation. 3. During summer, the raw rubber becomes soft and sticky, while ... It gets tarnished in air due to oxidation. As a result, its durability is considerably by vulcanization.

Description : Name the type of plastic with one example each.

Last Answer : i) Thermosetting plastic: Examples: Nylon 6:6, Bakelite or Phenol formaldehyde, Urea formaldehyde, Epoxy resin etc.  ii) Thermoplasts or Thermo softening plastic: - Examples: Polyethylene, Teflon, Poly vinyl chloride, Polystyrene etc.

Description : Write composition of Wood’s metal. 

Last Answer : Composition:- Bi=50% Pb = 25% Sn = 12.5% Cd = 12.5%

Description : Postulates of Arrhenius theory of ionization. 

Last Answer : 1. The molecules of an electrolyte when dissolved in water split up into two kinds of charged particles, positively charged particle known as cation, negatively charged particle known as anion.  2. ... anions corresponds to the valency of the element or radical from which the ion is derived. 

Description : Define: i)Matrix, ii) slag

Last Answer : i) Matrix: Unwanted impurities associated with ore is called matrix. ii) Slag: The substance which is formed when flux reacts gangue.

Description : The expression for the inductance in terms of turns, flux and current is given by a) L = N dφ/di b) L = -N dφ/di c) L = Niφ d) L = Nφ/i

Last Answer : a) L = N dφ/di

Description : Light intensity is generally described in terms of __________ and measured in _________. ∙ A. Luminous flux density; Lumens per unit area ∙ B. Luminous flux intensity; Lumens per unit area ∙ C. Luminous flux density; Lumens per unit volume ∙ D. Luminous flux intensity; Lumens per unit volume

Last Answer : Luminous flux density; Lumens per unit area

Description : The chemical composition of slag formed during the smelting process in the extraction of copper is :-

Last Answer : The chemical composition of slag formed during the smelting process in the extraction of copper is :- A. `Cu_(2)O+ ... C. `CuFeS_(2)` D. `Cu_(2)S+FeO`

Description : Which of the following statement(s) is/are correct about slag?

Last Answer : Which of the following statement(s) is/are correct about slag? A. The chemical composition of slag ... is of slag. D. The slag is fusible matter

Description : The chemical composition of slag formed during the smelting process in the extraction of copper is :-

Last Answer : The chemical composition of slag formed during the smelting process in the extraction of copper is :- A. `Cu_(2)O+ ... C. `CuFeS_(2)` D. `Cu_(2)S+FeO`

Description : The chemical composition of slag formed during the smelting process in the extraction of copper is :-

Last Answer : The chemical composition of slag formed during the smelting process in the extraction of copper is :- A. `Cu_(2)O+ ... . `CuFeS_(2)` D. `Cu_(2)S++FeO`

Description : During the extraction of iron, slag produced is

Last Answer : During the extraction of iron, slag produced is A. Zone of heat absorption B. Zone of reduction only ... only D. Zone of reduction and zone of fusion

Description : When copper pyrites is roasted in excess of air, a mixture of `CuO + FeO` is formed. `FeO` is present as impurity. This can be removed as slag during

Last Answer : When copper pyrites is roasted in excess of air, a mixture of `CuO + FeO` is formed. `FeO` is present ... a basic flux D. CaO, which is a basic flux

Description : Cast iron contains phosphorus as impurity. In Bessemerisation of this cast iron the slag formed is

Last Answer : Cast iron contains phosphorus as impurity. In Bessemerisation of this cast iron the slag formed is A. `FePO_(4)` B. ` ... (4)` D. `Zn_(3)(PO_(4))_(2)`

Description : The slag formed in the blast furnace during the extraction of iron from haematite is

Last Answer : The slag formed in the blast furnace during the extraction of iron from haematite is A. `Ca_(3)(PO_(4))_(2)` ... (3)` C. `FeSiO_(3)` D. `MnSiO_(3)`

Description : In the extraction of copper, the slag formed in the blast furnace is

Last Answer : In the extraction of copper, the slag formed in the blast furnace is A. `CaSiO_(3)` B. `FeSiO_(3)` C. `FeSiO_(3)` D. `MnSiO_(3)`

Description : What is the viscosity of slag of blast furnace?

Last Answer : What is the answer ?

Description : Skin becomes wrinkled in the old age due to (a) loss of elastic tissue in the dermis (b) considerable slag in the rate of dividing cells in the stratum germinativum (c) gradual loss of elasticity in the subcutaneous layer (d) all of these

Last Answer : Ans:(b)

Description : Slag is a name given for - (1) molten iron (2) molten sand (3) molten alumina (4) molten calcium silicate

Last Answer : (3) molten alumina Explanation: Slag is a partially vitreous byproduct of the process of smelting ore, which separates the desired metal fraction from the unwanted fraction. A good example is steelmaking ... separated from the metal, and assist in the removal of sulfur and phosphorus from the steel.

Description : Which furnace burns low-ash fusion coal and retains most of the coal ash in the slag?

Last Answer : Cyclone furnace.

Description : Basic slag is not ground in (A) Jaw crushers (B) Ball mills

Last Answer : (A) Jaw crushers

Description : Which of the following is the most widely used insulating material for steam carrying pipelines? (A) Ceramic fibre blanket (B) Glass wool and 85% magnesia (C) Vermiculite (D) Slag wool

Last Answer : (B) Glass wool and 85% magnesia

Description : How is the slag obtained in the extraction of iron useful?

Last Answer : Slag obtained in blast furnace is used as one of theraw materials of glass and cement.

Description : Why is slag collected above molten iron?

Last Answer : Slag is lighter than molten iron and collects above molten iron. Slag prevents oxidations of molten iron back into iron oxide.

Description : What is a slag?

Last Answer : Ans: A slag is an easily fusible material which is formed when gangue still present in the roasted or the calcined ore combines with the flux. For example: in the metallurgy of Iron, CaO(flux) combines with silica(SiO2) gangue to form easily fusible calcium silicate (CaSiO3) slag.

Description : High ash containing coke (A) Produces more slag when used in the blast furnace (B) Has poor strength and abrasion resistance (C) Is desirable in producer gas manufacture (D) None of these

Last Answer : (A) Produces more slag when used in the blast furnace

Description : Low grade phosphate rock can be used in electrical furnace, because (A) Of the better CaO/SiO2 balance for slag formation (B) CaO content is less (C) It is cheap (D) It produces low cost product

Last Answer : (A) Of the better CaO/SiO2 balance for slag formation

Description : Raw materials used for producing __________ cement does not contain iron oxide. (A) Waterproof (B) Slag (C) White (D) Pozzolan

Last Answer : (C) White

Description : Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material? (A) Slag cement (B) Glasses (C) Porcelain/Potteries (D) Teflon

Last Answer : (D) Teflon

Description : Pick out the wrong statement. (A) Dry process is used for the manufacture of cement, when the raw material is blast furnace slag (B) Portland cement is made employing wet process (C) Gypsum is added to Portland cement to lengthen its setting time (D) None of these

Last Answer : (D) None of these

Description : Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag. (A) 2 (B) 3 (C) 0.8 (D) 6

Last Answer : (B) 3

Description : Most of the phosphorous present in the blast furnace burden enters into (A) Hot metal (B) Flue gases (C) Slag (D) Refractory lining

Last Answer : (A) Hot metal

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