General Knowledge - Chemistry - Discussion

Discussion :: Chemistry - Section 1 (Q.No.6)


The metallurgical process in which a metal is obtained in a fused state is called

[A]. smelting
[B]. roasting
[C]. calcinations
[D]. froth floatation

Answer: Option A


No answer description available for this question.

Suhaib said: (Jun 12, 2011)  
Can you explain metallurgical process?

Navneet Thakur said: (Jul 28, 2011)  
Metallurgy is the process of extraction of metal from their ores.

And when concentrated or roasteded ore is heated with iron is known as smelting.

Ankita said: (Sep 28, 2011)  
Smelting uses heat and a chemical reducing agent to change the oxidation state of the metal ore; the reducing agent is commonly a source of carbon such as coke, or in earlier times charcoal

Rajesh Kumar said: (Dec 17, 2011)  
I cannot explain this answer so please give the accurate and easy example and explain it.

Gopal said: (Jan 20, 2012)  
Metallurgy is the process of extracting metal from their ores... the metals ores heated or fused with some reducing agent this is called smelting....

Ali Sir Damoh said: (Apr 4, 2012)  
The pure metal is obtained by ore like Al is obtained by bauxite metallurgy has many step.

Vas said: (Apr 20, 2012)  
Use the coak and silica impurities to remove the metals like As, Antimony, Bi.

Haresh Kumar said: (May 9, 2012)  
Metallurgy is the process in which metal is extracted from its ore by heating/reducing

Pramod Kumar said: (Feb 26, 2013)  
Please tell me how can change antimony sulphate (sb2so4) into antimony sulphite (sb2so3).

How Sulfite sulphate or any change to?

Okoh Emmanuel said: (Mar 19, 2013)  
Metallurgy is the process whereby ore are reduce by heating them with co2 or coke to obtain a pure metal. The heating of this ore is called smelting.

Abdurehman said: (Apr 6, 2013)  
What is difference between orbit and shell?

Jyothsna said: (Nov 3, 2013)  
calcinations is the process take place in the presence of oxygen.

Roasting is the process take place in the absence of oxygen.

Jyothsna said: (Nov 3, 2013)  
According to my knowledge I think orbit is the path that electron move whereas shell is the place where electrons are present.

Raje said: (Nov 21, 2013)  
Smelting means concentrated ore is obtained in its melted state.

Santosh Gaidhankar said: (Jan 6, 2014)  
Metallurgy is process of extracting metal from their ores for that purpose ignition that is heat required after heating metal fuses that process is called smelting. In short it just a fused metal form due to heating.

Aarthi said: (Feb 10, 2014)  
Smelting is to fuse or melt (ore) in order to separate the metal contained.

Sandeep Avhad said: (May 20, 2014)  
Smelting is a form of extractive metallurgy; its main use is to produce a metal from its ore. This includes production of silver, iron, copper and other base metals from their ores. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gasses or slag and leaving just the metal behind. The reducing agent is commonly a source of carbon such as coke, or in earlier times charcoal. The carbon (or carbon monoxide derived from it) removes oxygen from the ore, leaving behind elemental metal. The carbon is thus oxidized in two stages, producing first carbon monoxide and then carbon dioxide. As most ores are impure, it is often necessary to use flux, such as limestone, to remove the accompanying rock gangue as slag.

Plants for the electrolytic reduction of aluminium are also generally referred to as smelters. These do not melt aluminium oxide but instead dissolve it in aluminium fluoride. They normally use carbon electrodes, but novel smelter designs use electrodes that are not consumed in the process. The end product is molten aluminium.

Sandeep said: (May 22, 2014)  
What is calcination?

Shantanu said: (Nov 12, 2014)  
If the ore is not oxide and found as carbonate or sulphide then it is subjected to calcination.

Calcination is process of heating carbonate ores in absence of oxygen.

Eg: CaCO3 gives on calcination CaO +CO2.

Desert said: (Mar 19, 2015)  
What is fused state?

Peweh Rosine said: (May 30, 2015)  
I will like being this online chemistry. But I don't understand the meaning of calcination, those two definition are confusing.

Aman said: (Aug 23, 2015)  
Fused state means molten state and calcination means heating of carbonate ore like caco3 in absence of air.

Tarun Kumar said: (Sep 6, 2015)  
I cannot explain it so please explain it with in detail.

Ababio said: (Dec 12, 2015)  
Does smelting have any bacterial means?

K.Karthik said: (Apr 10, 2016)  
Metallurgy is a process of extraction metal from ore. The metal is obtained fusion state in smelting because during the process of smelting the metal is mixed with slag & a flux. The melting is over high so the metal is obtained fusion state.

Nawaz Shaikh said: (May 25, 2016)  
Thank you all for giving the valuable information about the chemical process.

Akash said: (Sep 10, 2016)  
But the smelting term is related to iron extraction. Can you please explain.

Thomas Nyainda said: (Apr 13, 2017)  
What is the difference between decomposition and calcination?

Bhavana said: (Apr 17, 2017)  

Decomposition is the process of breakdown of substances from one phase into another, while calcination is the process of heating a substance to a high temperature, but below its melting point, to bring about thermal decomposition.

Sadia Amjad said: (May 11, 2017)  
The typical range of molar enthalpies for the strongest inter molecular (hydrogen) bonds is?

Siva Rama Krishna A said: (Sep 9, 2017)  
Calcination is heating to high temperatures in absence of air. Roasting is heating to high temperatures in the presence of air.

Mary said: (Mar 29, 2018)  
What is froth floatation?

Aditi said: (Jul 8, 2018)  
What is froth floatation?

Alalade Shirley said: (Apr 26, 2019)  
How to calculate the oxidation number?

Ruchi said: (May 21, 2019)  
Flux and coke is heated to fusion in smelting.

Raghu Yadav said: (Aug 28, 2020)  
Froth floatation in simple used for mineral processing.

Festus said: (Jul 16, 2021)  
Please, can someone explain what is calcination and roasting?

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