Is the center of the Earth really molten metal?

Is the center of the Earth really molten metal?
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A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. This is known as

Description : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. This is known as

Last Answer : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. ... Smelting B. Calcination C. Roasting D. Liquition

In extractive metallurgy of lead, the reduction of the roasted ore to the molten metal by heating with coke is called

Description : In extractive metallurgy of lead, the reduction of the roasted ore to the molten metal by heating with coke is called

Last Answer : In extractive metallurgy of lead, the reduction of the roasted ore to the molten metal by heating with ... B. roasting C. calcination D. None of these

Is Steel rod Be heated into a molten metal is example of a phase change?

Description : Is Steel rod Be heated into a molten metal is example of a phase change?

Last Answer : Feel Free to Answer

Which is the most commonly used molten metal for cooling of nuclear reactors? (A) Calcium (B) Sodium (C) Mercury (D) Zinc

Description : Which is the most commonly used molten metal for cooling of nuclear reactors? (A) Calcium (B) Sodium (C) Mercury (D) Zinc

Last Answer : (B) Sodium

Which of the following reactors is operated at high neutron flux and low power level? (A) Breeder reactor (B) Research reactor (C) Heterogeneous reactor (D) Liquid metal (e.g., molten sodium) cooled reactor

Description : Which of the following reactors is operated at high neutron flux and low power level? (A) Breeder reactor (B) Research reactor (C) Heterogeneous reactor (D) Liquid metal (e.g., molten sodium) cooled reactor

Last Answer : (B) Research reactor

Use of molten metal as a coolant in fast breeder reactor helps in (A) Rapid heat transfer from the core (B) Accelerating the reaction rate in the core (C) Breeding neutrons (D) Accelerating the neutrons

Description : Use of molten metal as a coolant in fast breeder reactor helps in (A) Rapid heat transfer from the core (B) Accelerating the reaction rate in the core (C) Breeding neutrons (D) Accelerating the neutrons

Last Answer : (A) Rapid heat transfer from the core

Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an __________ reactor. (A) Homogeneous (B) Graphite moderated (C) Fast breeder (D) Enriched uranium (3% U-235) fuelled

Description : Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an __________ reactor. (A) Homogeneous (B) Graphite moderated (C) Fast breeder (D) Enriched uranium (3% U-235) fuelled

Last Answer : (C) Fast breeder

The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump. (A) Electromagnetic (B) Reciprocating (C) Centrifugal (D) Volute

Description : The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump. (A) Electromagnetic (B) Reciprocating (C) Centrifugal (D) Volute

Last Answer : (A) Electromagnetic

In which case, molten metal is used to do welding? (i) Groove type (ii) spot type (iii) Plug type (iv) None

Description : In which case, molten metal is used to do welding? (i) Groove type (ii) spot type (iii) Plug type (iv) None

Last Answer : (iii) Plug type

Which of the following is not used as a medium for high temperature heating ? (A) Dowtherm (B) Mercury (C) Liquid metal (e.g. molten sodium) (D) Fused salts (e.g., an eutectic mixture of 53% KNO3 , 40% NaNO2and 7% NaNO3 )

Description : Which of the following is not used as a medium for high temperature heating ? (A) Dowtherm (B) Mercury (C) Liquid metal (e.g. molten sodium) (D) Fused salts (e.g., an eutectic mixture of 53% KNO3 , 40% NaNO2and 7% NaNO3 )

Last Answer : (B) Mercury

Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) (A) V/A (B) V/A2 (C) V2/A (D) V2/A2

Description : Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) (A) V/A (B) V/A2 (C) V2/A (D) V2/A2

Last Answer : (D) V2/A2

A pycnometer is used for the measurement of (A) Flow rate of molten metal (B) Specific gravity of a liquid (C) Composition of alloys (D) Concentration of a solution

Description : A pycnometer is used for the measurement of (A) Flow rate of molten metal (B) Specific gravity of a liquid (C) Composition of alloys (D) Concentration of a solution

Last Answer : Option B

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

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

Addition of silicon to cast iron (A) Promotes graphite module formation (B) Improves its ductility (C) Does not promote graphite flakes formation (D) Increases the fluidity of molten metal

Description : Addition of silicon to cast iron (A) Promotes graphite module formation (B) Improves its ductility (C) Does not promote graphite flakes formation (D) Increases the fluidity of molten metal

Last Answer : Option D

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

Main advantage of 3-piece P F Mould is? (i) To overcome fin defect.* (ii) To prevent the flaw of molten metal (iii) To make proper weld size (iv) None to the above

Description : Main advantage of 3-piece P F Mould is? (i) To overcome fin defect.* (ii) To prevent the flaw of molten metal (iii) To make proper weld size (iv) None to the above

Last Answer : (i) To overcome fin defect.*

In which of the following welding methods, the molten metal is poured for joining the metals ?

Description : In which of the following welding methods, the molten metal is poured for joining the metals ?   (a) Gas welding (b) Thermit welding (c) TIG welding (d) Arc welding 

Last Answer : In which of the following welding methods, the molten metal is poured for joining the metals ?   (a) Gas welding (b) Thermit welding (c) TIG welding (d) Arc welding 

The oldest rocks in the earth's crust were once molten; and came from deep in- side the earth. The molten rock; called magma; spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called?

Description : The oldest rocks in the earth's crust were once molten; and came from deep in- side the earth. The molten rock; called magma; spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called?

Last Answer : igneous rocks

What do we call molten rock when it is outside the earth?

Description : What do we call molten rock when it is outside the earth?

Last Answer : Lava

Is molten material meited rock found on earth surface?

Description : Is molten material meited rock found on earth surface?

Last Answer : Need answer

Molten rock below the surface of the earth is called – (1) Basalt (2) Laccolith (3) Lava (4) Magma

Description : Molten rock below the surface of the earth is called – (1) Basalt (2) Laccolith (3) Lava (4) Magma

Last Answer : (4) Magma Explanation: Magma is a mixture of molten or semi-molten rock, volatiles and solids that is found beneath the surface of the Earth. When magma erupts from a volcano or other vent, the ... . When lava cools on the Earth's surface and forms a solid structure, it is called igneous rock.

What is the Molten rock below the surface of the earth?

Description : What is the Molten rock below the surface of the earth?

Last Answer : Magma

What is the Molten rock below the surface of the earth?

Description : What is the Molten rock below the surface of the earth?

Last Answer : Magma

Rocks formed from molten magma solidification at earth surface is — rock a. Igneous b. Sedimentary c. Metamorphic d. None of these

Description : Rocks formed from molten magma solidification at earth surface is — rock a. Igneous b. Sedimentary c. Metamorphic d. None of these

Last Answer : a. Igneous

Molten rock below the surface of the earth is called (1) Basalt (2) Laccolith (3) Lava (4) Magma

Description : Molten rock below the surface of the earth is called (1) Basalt (2) Laccolith (3) Lava (4) Magma

Last Answer : Magma

In hydrodynamic bearing, when the shaft begins to rotate in clockwise direction, (A) The journal climbs to the right side of the bearing without metal to metal contact (B) The journal climbs to the left side of the bearing without metal to metal contact (C) The journal sinks down to the bottom of the bearing (D) The journal is at the center of the bearing

Description : In hydrodynamic bearing, when the shaft begins to rotate in clockwise direction, (A) The journal climbs to the right side of the bearing without metal to metal contact (B) The journal climbs to the left ... sinks down to the bottom of the bearing (D) The journal is at the center of the bearing

Last Answer : (A) The journal climbs to the right side of the bearing without metal to metal contact

If the planes that struck the twin towers one hundred floors up are the reason they collapsed, why was there 3000F molten steel in the sub basements four weeks later?

Description : If the planes that struck the twin towers one hundred floors up are the reason they collapsed, why was there 3000F molten steel in the sub basements four weeks later?

Last Answer : I think you answered your own question

Most covalent compounds (a) Behave like electrolytes in the molten state (b) Have high melting and boiling points (c) Are hard substances because of strong covalent bonds (d) Are more soluble in non-polar solvents than in polar solvents

Description : Most covalent compounds (a) Behave like electrolytes in the molten state (b) Have high melting and boiling points (c) Are hard substances because of strong covalent bonds (d) Are more soluble in non-polar solvents than in polar solvents

Last Answer : Ans:(d)

Aluminium is extracted from bauxite (a) By reduction with carbon (b) By reduction with Mg (c) By reduction with CO (d) By electrolysis in molten cryolite

Description : Aluminium is extracted from bauxite (a) By reduction with carbon (b) By reduction with Mg (c) By reduction with CO (d) By electrolysis in molten cryolite

Last Answer : Ans:(d)

What is the role of molten cryolite in the extraction of aluminium?

Description : What is the role of molten cryolite in the extraction of aluminium?

Last Answer : When pure alumina is mixed with molten cryolite, it forms an electrolyte at 1223K. Molten cryolite also acts as a solvent for alumina.

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.

During manufacture of glass, molten glass is cooled slowly to make it

Description : During manufacture of glass, molten glass is cooled slowly to make it

Last Answer : lose brittleness.

Why addition of flint and quartz to molten glass does not shrink or get transformed?

Description : Why addition of flint and quartz to molten glass does not shrink or get transformed?

Last Answer : Flint and quartz are forms of silica, they do not absorb water. As water is not absorbed, they do not get transformed on heating and do not shrink.

How is molten glass shaped?

Description : How is molten glass shaped?

Last Answer : Molten glass is made into desired shapes by either blowing or moulding or pressing between rollers.

Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid

Description : Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid

Last Answer : B) Has low melting point

When do you use "molten" vs "melted"?

Description : When do you use "molten" vs "melted"?

Last Answer : “molten” historically was simply the past participle of “melt” and thus synonymous with “melted” but now is used as an adjective to refer to things that have been melted by very high heat and are hot in their liquid form like metal or rock or wax. “Melted” would be used otherwise.

Which of the following RP technologies uses molten material as the starting material? a.Three-Dimensional Printing b.Fused-Deposition Modeling c.Stereolithography d.Selective Laser Sintering

Description : Which of the following RP technologies uses molten material as the starting material? a.Three-Dimensional Printing b.Fused-Deposition Modeling c.Stereolithography d.Selective Laser Sintering

Last Answer : c.Stereolithography

(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

(a) Show the formation of Na2O by the transfer of electrons between the combining atoms. (b) Why are ionic compounds usually hard? (c) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state? -Chemistry

Description : (a) Show the formation of Na2O by the transfer of electrons between the combining atoms. (b) Why are ionic compounds usually hard? (c) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state? -Chemistry

Last Answer : (b) It is due to strong force of attraction between oppositely charged ions. (c) In solid state, ions are not free to move whereas in molten state ions are free to move, therefore, they conduct electricity in molten state.

Give reason for the following: (a) Aluminium oxide is considered as an amphoteric oxide. (b) Ionic compounds conduct electricity in molten state. -Chemistry

Description : Give reason for the following: (a) Aluminium oxide is considered as an amphoteric oxide. (b) Ionic compounds conduct electricity in molten state. -Chemistry

Last Answer : a) Aluminium oxide reacts with both acids as well as bases.b) Ionic compounds in molten state conduct electricity. Explanation: a) An amphoteric oxide as one that shows chemical reactivity with ... ions are present in the liquid state. These free ions enable the solution to conduct electricity.

What keeps the continents floating on a sea of molten rock? -Geography

Description : What keeps the continents floating on a sea of molten rock? -Geography

Last Answer : answer:

How many of following are correctly matched for electrolystic reducing in molten state.

Description : How many of following are correctly matched for electrolystic reducing in molten state.

Last Answer : How many of following are correctly matched for electrolystic reducing in molten state.

Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.

Description : Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.

Last Answer : Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.

Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. Coke powder is spreadded over the molten electro

Description : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. Coke powder is spreadded over the molten electro

Last Answer : Electrolytic reduction of `Al_(2)O_(3)`. Electrolyte (`Al_(2)O_(3)+"cryolite")` Anode: Graphite rods. ... of molten aluminium by air D. (a) both (b)

When molten sulphur is quenched, the following is formed.

Description : When molten sulphur is quenched, the following is formed.

Last Answer : When molten sulphur is quenched, the following is formed. A. Monoclinic sulphur B. Rhombic sulphur C. Crystex(plastic) D. `gamma`-sulphur

Why does hot water and molten rock tend to rise?

Description : Why does hot water and molten rock tend to rise?

Last Answer : Compared to cold water, hot water has less density; therefore itfloats on the colder water - it tends to rise. I am not surewhether the situation is the same for molten rock; it likely hasless density than non-molten rock, but I am not sure whether that'sthe only reason it rises.

What happens when molten igneous rock reaches the ocean?

Description : What happens when molten igneous rock reaches the ocean?

Last Answer : Feel Free to Answer

What is a molten rock beneath the earth's crust?

Description : What is a molten rock beneath the earth's crust?

Last Answer : Feel Free to Answer

Is the name given to molten rock below the Earth's surface.?

Description : Is the name given to molten rock below the Earth's surface.?

Last Answer : Magma. Magma rises towards the surface when it's less dense thanrock around it. Otherwise, it collects in magma chambers and cools,forming igneous rock.