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

Slag is a name given for - (1) molten iron (2) molten sand (3) molten alumina (4) molten calcium silicate
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(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 slag: quicklime and magnesite are introduced for refractory protection, neutralizing the alumina and silica separated from the metal, and assist in the removal of sulfur and phosphorus from the steel.
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Slag is a name given for (1) molten iron (2) molten sand (3) molten alumina (4) molten calcium silicate

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

Last Answer : molten alumina

furnace slag is mainly molten (A) Sand (B) Magnesium silicate (C) Calcium silicate (D) Iron pyrite

Description : furnace slag is mainly molten (A) Sand (B) Magnesium silicate (C) Calcium silicate (D) Iron pyrite

Last Answer : Option C

The slag which floats on the surface of the molten iron generally contains (A) Lime (CaO) 45% (B) Silica (SiO2) 35% (C) Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8% (D) All the above

Description : The slag which floats on the surface of the molten iron generally contains (A) Lime (CaO) 45% (B) Silica (SiO2) 35% (C) Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8% (D) All the above

Last Answer : Answer: Option D

The slag which floats on the surface of the molten iron generally contains (A) Lime (CaO) 45% (B) Silica (SiO2) 35% (C) Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8% (D) All these

Description : The slag which floats on the surface of the molten iron generally contains (A) Lime (CaO) 45% (B) Silica (SiO2) 35% (C) Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8% (D) All these

Last Answer : Answer: Option D

The development of first 28 days strength is on account of the hydration of (a) Tricalcium silicate (b) Dicalcium silicate (c) Tricalcium aluminate (d) Tetra calcium alumina ferrite

Description : The development of first 28 days strength is on account of the hydration of (a) Tricalcium silicate (b) Dicalcium silicate (c) Tricalcium aluminate (d) Tetra calcium alumina ferrite

Last Answer : (a) Tricalcium silicate

Why is slag collected above molten iron?

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.

Dephosphorization of molten pig iron is favoured by (A) Oxidising and basic slag (B) Reducing and basic slag (C) High activity co-efficient of phosphorous in metal (D) Oxidising and neutral slag

Description : Dephosphorization of molten pig iron is favoured by (A) Oxidising and basic slag (B) Reducing and basic slag (C) High activity co-efficient of phosphorous in metal (D) Oxidising and neutral slag

Last Answer : Option B

Pick up the correct statement from the following: (A) Roasting is not necessary if iron ore is an oxide (B) Impurities float on the molten iron as slag (C) The slag contains lime about 45% (D) All the above

Description : Pick up the correct statement from the following: (A) Roasting is not necessary if iron ore is an oxide (B) Impurities float on the molten iron as slag (C) The slag contains lime about 45% (D) All the above

Last Answer : Answer: Option D

36. Aluminium is extracted from alumina (Al2O3 ) by electrolysis of a molten mixture of : (1) Al2O3 + KF + Na3AlF6 (2) Al2O3 + HF + NaAlF4 (3) Al2O3 + CaF2 + NaAlF4 (4) Al2O3 + Na3AlF6 + CaF2

Description : 36. Aluminium is extracted from alumina (Al2O3 ) by electrolysis of a molten mixture of : (1) Al2O3 + KF + Na3AlF6 (2) Al2O3 + HF + NaAlF4 (3) Al2O3 + CaF2 + NaAlF4 (4) Al2O3 + Na3AlF6 + CaF2

Last Answer : Al2O3 + Na3AlF6 + CaF2

Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products

Description : Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products

Last Answer : ANSWER: X -- REMOVES SILICATE WASTE PRODUCTS

During pudding (A) Molten metal is kept clear of the fuel (B) Carbon is converted into carbonic acid gas (C) Silicon forms a slag (D) All the above

Description : During pudding (A) Molten metal is kept clear of the fuel (B) Carbon is converted into carbonic acid gas (C) Silicon forms a slag (D) All the above

Last Answer : Answer: Option D

Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous

Description : Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous

Last Answer : (i) Aluminium oxide (slag). *

Which of the following is not used as a surface active agent in a flocculation operation? (A) Sodium silicate (B) Quartz (C) Lime (D) Alumina

Description : Which of the following is not used as a surface active agent in a flocculation operation? (A) Sodium silicate (B) Quartz (C) Lime (D) Alumina

Last Answer : (B) Quartz

Asbestos (A) Is a natural fibrous mineral substance (B) Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) (C) Contains iron oxide and alumina (D) All the above

Description : Asbestos (A) Is a natural fibrous mineral substance (B) Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) (C) Contains iron oxide and alumina (D) All the above

Last Answer : Answer: Option D

(1) Calcium silicate and calcium alurninate Explanation: Portland cement is the most common type of cement in general use around the world because it is a basic ingredient of concrete, mortar, stucco and most non-specialty grout. It usually originates from limestone. It is a fine powder produced by grinding Portland cement. clinker (more than 90%), a limited amount of calcium sulfate (which controls the set time) and up to 5% minor constituents.

Description : (1) Calcium silicate and calcium alurninate Explanation: Portland cement is the most common type of cement in general use around the world because it is a basic ingredient of concrete, mortar, stucco ... limited amount of calcium sulfate (which controls the set time) and up to 5% minor constituents.

Last Answer : Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved

Quartz is made of – (1) Calcium Sulphate (2) Calcium Silicate (3) Sodium Sulphate (4) Sodium Silicate

Description : Quartz is made of – (1) Calcium Sulphate (2) Calcium Silicate (3) Sodium Sulphate (4) Sodium Silicate

Last Answer : (4) Sodium Silicate Explanation: Quartz is an abundant mineral in the Earth's continental crust. It is made tip of a continuous framework of SiO4 silicon-oxygen tetrahedra, wit Ii each oxygen being shared between two tetrahedra, giving an overall formula SiO2.

The chemical name or Quartz is – (1) Calcium oxide (2) Calcium phosphate (3) Sodium phosphate (4) Sodium silicate

Description : The chemical name or Quartz is – (1) Calcium oxide (2) Calcium phosphate (3) Sodium phosphate (4) Sodium silicate

Last Answer : (4) Sodium silicate Explanation: Quartz is a compound of one part silicon and two parts of oxygen, silicon dioxide, SiO2. Quartz is the most abundant silica mineral. It is used in a ... silicon alloys, etc. The various grades of sodium silicate are characterized by their SiO2:Na2O weight ratio.

Glass is mainly composed of - (1) Sodium silicate (2) Calcium carbonate (3) Calcium hydroxide (4) Sodium bicarbonate

Description : Glass is mainly composed of - (1) Sodium silicate (2) Calcium carbonate (3) Calcium hydroxide (4) Sodium bicarbonate

Last Answer : (1) Sodium silicate Explanation: Glass is made from silica (SiO₂) and soda lime, which react to form sodium silicate.

Sodium calcium silicate is called _______. (1) Hard glass (2) Borosilicate glass (3) Soft glass (4) Jena glass

Description : Sodium calcium silicate is called _______. (1) Hard glass (2) Borosilicate glass (3) Soft glass (4) Jena glass

Last Answer : (3) Soft glass Explanation: Ordinary glass which is also known as soda glass or soft glass is a mixture of sodium silicate, Calcium silicate, and Silica.

The chemical name of quartz is (1) Calcium oxide (2) Calcium phosphate (3) Sodium phosphate (4) Sodium silicate

Description : The chemical name of quartz is (1) Calcium oxide (2) Calcium phosphate (3) Sodium phosphate (4) Sodium silicate

Last Answer : Sodium silicate

Cement is usually a mixture of : (1) Calcium silicate and calcium aluminate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide

Description : Cement is usually a mixture of : (1) Calcium silicate and calcium aluminate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide 

Last Answer : Calcium silicate and calcium aluminate

Quartz is made of (1) Calcium Sulphate (2) Calcium Silicate (3) Sodium Sulphate (4) Sodium Silicate

Description : Quartz is made of (1) Calcium Sulphate (2) Calcium Silicate (3) Sodium Sulphate (4) Sodium Silicate

Last Answer :  Sodium Silicate

Sand and __________ is fused at 1300°C, to produce sodium silicate. (A) Limestone (B) Soda ash (C) Coke (D) Sodium sulphate

Description : Sand and __________ is fused at 1300°C, to produce sodium silicate. (A) Limestone (B) Soda ash (C) Coke (D) Sodium sulphate

Last Answer : (B) Soda ash

The constituent of cement which act as Binders are a) Sand and silica b) Silica and carbon c) tricalcium silicate dicalcium silicate and carbon d) tricalcium aluminate,dicalcium silicate and tricalcium silicate *

Description : The constituent of cement which act as Binders are a) Sand and silica b) Silica and carbon c) tricalcium silicate dicalcium silicate and carbon d) tricalcium aluminate,dicalcium silicate and tricalcium silicate *

Last Answer : d) tricalcium aluminate,dicalcium silicate and tricalcium silicate *

(a) State and explain Kohlrausch law. (b) How much electricity in terms of Faradays is required to produce 20 g of calcium from molten CaCl2? -Chemistry

Description : (a) State and explain Kohlrausch law. (b) How much electricity in terms of Faradays is required to produce 20 g of calcium from molten CaCl2? -Chemistry

Last Answer : a) Corrosion is an electrochemical phenomenon. At a particular spot of iron j oxidation it takes place and the spot behaves j as anode and the reaction will be: i At anode : 2Fe(s) → 2Fe2+ + 4e- Electrons ... Ca i.e. 40 g of Ca requires electricity = 2F ∴ 20 g of Ca will require electricity = 1F

The major constituents of glass are (A) Lime, clay and soda ash (B) Sand, lime and soda ash (C) Silica, alumina and clay (D) Silica, alumina and soda ash

Description : The major constituents of glass are (A) Lime, clay and soda ash (B) Sand, lime and soda ash (C) Silica, alumina and clay (D) Silica, alumina and soda ash

Last Answer : (B) Sand, lime and soda ash

Fusion of limestone and __________ produces high alumina cement. (A) Sand (B) Bauxite (C) Quicklime (D) Calcite

Description : Fusion of limestone and __________ produces high alumina cement. (A) Sand (B) Bauxite (C) Quicklime (D) Calcite

Last Answer : (B) Bauxite

What is the stage of the sand becoming a silicon? a. Liquid b. Gas c. Molten d. Hot

Description : What is the stage of the sand becoming a silicon? a. Liquid b. Gas c. Molten d. Hot

Last Answer : c. Molten

What is the stage of the sand becoming silicon? A. Hot B. Gas C. Liquid D. Molten

Description : What is the stage of the sand becoming silicon? A. Hot B. Gas C. Liquid D. Molten

Last Answer : D. Molten

Uniform ramming of sand in green sand moulding process leads to (A) Reduced chance of gas porosity (B) Greater dimensional stability of the casting (C) Uniform flow of molten metal into the mould cavity (D) Less sand expansion type of casting defect

Description : Uniform ramming of sand in green sand moulding process leads to (A) Reduced chance of gas porosity (B) Greater dimensional stability of the casting (C) Uniform flow of molten metal into the mould cavity (D) Less sand expansion type of casting defect

Last Answer : Option B

What is the stage of the sand becoming a silicon? ∙ a. Liquid ∙ b. Gas ∙ c. Molten ∙ d. Hot What is the stage of the sand becoming a silicon? ∙ a. Liquid ∙ b. Gas ∙ c. Molten ∙ d. Hot

Description : What is the stage of the sand becoming a silicon? ∙ a. Liquid ∙ b. Gas ∙ c. Molten ∙ d. Hot

Last Answer : c. Molten

Function of Calcium fluoride/flour spar in portion is? (i) To separate slag* (ii) To separate aluminum (iii) To separate ferrous (iv) No separation

Description : Function of Calcium fluoride/flour spar in portion is? (i) To separate slag* (ii) To separate aluminum (iii) To separate ferrous (iv) No separation

Last Answer : (i) To separate slag*

What is the sign of calcium silicate ?

Description : What is the sign of calcium silicate ?

Last Answer : : The signal of calcium silicate is CaSiO3

The chemical name of quartz is (a) Calcium oxide (b) Calcium phosphate (c) Sodium phosphate (d) Sodium silicate

Description : The chemical name of quartz is (a) Calcium oxide (b) Calcium phosphate (c) Sodium phosphate (d) Sodium silicate

Last Answer : Ans:(d)

The most common filter aid is (A) Diatomaceous earth (B) Calcium silicate (C) Sodium carbonate (D) Silica gel

Description : The most common filter aid is (A) Diatomaceous earth (B) Calcium silicate (C) Sodium carbonate (D) Silica gel

Last Answer : (A) Diatomaceous earth

Photographic plates are coated with (A) Silver nitrate (B) Silver halide (C) Calcium silicate (D) Metallic silver

Description : Photographic plates are coated with (A) Silver nitrate (B) Silver halide (C) Calcium silicate (D) Metallic silver

Last Answer : (B) Silver halide

Mixture of sodium silicate and calcium silicate is called

Description : Mixture of sodium silicate and calcium silicate is called

Last Answer : glass.

Heating of __________ to 120°C, produces plaster of paris. (A) Blue vitriol (B) Gypsum (C) Calcium silicate (D) Calcium sulphate

Description : Heating of __________ to 120°C, produces plaster of paris. (A) Blue vitriol (B) Gypsum (C) Calcium silicate (D) Calcium sulphate

Last Answer : (B) Gypsum

Main constituents of Portland cement are calcium aluminate and (A) Gypsum(B) Silicates(C) Sodium silicate(D) Carbonates

Description : Main constituents of Portland cement are calcium aluminate and (A) Gypsum (B) Silicates (C) Sodium silicate (D) Carbonates

Last Answer : (B) Silicates

__________ is the major constituent of the Portland cement. (A) Calcium carbonate (B) Calcium oxide (C) Tricalcium silicate (D) Calcium sulphate

Description : __________ is the major constituent of the Portland cement. (A) Calcium carbonate (B) Calcium oxide (C) Tricalcium silicate (D) Calcium sulphate

Last Answer : (C) Tricalcium silicate

Finely ground calcium aluminate & silicate is a/an (A) Cermet (B) Cement (C) Abrasive (D) Explosive

Description : Finely ground calcium aluminate & silicate is a/an (A) Cermet (B) Cement (C) Abrasive (D) Explosive

Last Answer : (B) Cement

Photographic plates are coated with (A) Silver nitrate (B) Silver halide (C) Calcium silicate (D) Metallic silver

Description : Photographic plates are coated with (A) Silver nitrate (B) Silver halide (C) Calcium silicate (D) Metallic silver

Last Answer : (B) Silver halide

The most commonly used admixture which prolongs the setting and hardening time is (A) Gypsum (B) Calcium chloride (C) Sodium silicate (D) All of the above

Description : The most commonly used admixture which prolongs the setting and hardening time is (A) Gypsum (B) Calcium chloride (C) Sodium silicate (D) All of the above

Last Answer : (A) Gypsum

Di-calcium silicate (C2S) (A) Hydrates rapidly (B) Generates less heat of hydration (C) Hardens rapidly (D) Provides less ultimate strength to cement

Description : Di-calcium silicate (C2S) (A) Hydrates rapidly (B) Generates less heat of hydration (C) Hardens rapidly (D) Provides less ultimate strength to cement

Last Answer : Answer: Option B

The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Description : The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Last Answer : Answer: Option C

Initial setting of cement is caused due to (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Description : Initial setting of cement is caused due to (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Last Answer : Answer: Option C

The compound of Portland cement which contributes to the strength after two to three years is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra-calcium alumino ferrite

Description : The compound of Portland cement which contributes to the strength after two to three years is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra-calcium alumino ferrite

Last Answer : Answer: Option B

Pick up the compound responsible for early strength of cement from the following: (A) Tetra-calcium alumino-ferrite (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Di-calcium silicate

Description : Pick up the compound responsible for early strength of cement from the following: (A) Tetra-calcium alumino-ferrite (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Di-calcium silicate

Last Answer : Answer: Option B

Good quality cement contains higher percentage of (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Description : Good quality cement contains higher percentage of (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Last Answer : Answer: Option A