In the process of metallurgy, the ores used are first crushed and powdered, and then concentrated by various methods. Following the concentration, the metal is now extracted from the ore. To achieve this, the ore is first converted into a compound which is easy to reduce. This is achieved by various methods including calcination. Calcination is a process of converting an ore into its metal oxide, by heating the ore in limited supply or absence of air, at a temperature which is just below its melting point. In this process, the moisture is removed, the volatile impurities get expelled, and the carbonate ores are converted into oxide ores since they are easy to reduce.

Consider two chemical reactions (A) and (B) that take place during metallurgical process: (A) ZnCO 3 s ⟶ Δ ZnO s + CO 2 g (B) 2 ZnS s + 3 O 2 g ⟶ Δ 2 ZnO s + 2 SO 2 g The correct option of names given to them respectively is:

(A) is calcination and (B) is roasting

Both (A) and (B) are producing same product so both are roasting

Both (A) and (B) are producing same product so both are calcination

(A) is roasting and (B) is calcination

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Calcination is used in metallurgy for removal of

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Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

In the isolation of metals, calcination process usually results in:

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

What is calcination?

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Define roasting of ores. For what type of ores is it used?

HARD

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Differentiate between 'Roasting' and 'Calcination'

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

The process that involves the removal of sulphur from the ores is :

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Giving examples, differentiate between roasting and calcination.

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

What are roasting and calcinations? Explain with a chemical equation of each.

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Extraction of copper by smelting uses silica as an additive to remove.

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Consider two chemical reactions (A) and (B) that
take place during metallurgical process:
(A)

{ZnCO}_{3 (s)} \overset{Δ}{⟶} {ZnO}_{(s)} + {CO}_{2 (g)}

(B)

2 {ZnS}_{(s)} + 3 O_{2 (g)} \overset{Δ}{⟶} 2 {ZnO}_{(s)} + 2 {SO}_{2 (g)}

The correct option of names given to them respectively is:

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Which of the following process involves the roasting process?

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Answer the following question :

Write one point of difference between calcination and roasting.

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Which of the following reactions is an example of calcination process?

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Given below are two statements:
Statement I: In the metallurgy process,sulphide ore is converted to oxide before reduction.
Statement II: Oxide ores in general are easier to reduce.
In the light of the above statements, choose the most appropriate answer from the options given below:

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Explain calcination and roasting with examples.

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Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

In the extraction of copper from its sulphide ore, metal is finally obtained by the oxidation of cuprous sulphide with:

HARD

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

The carbon-based reduction method is NOT used for the extraction of

HARD

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Which series of reactions correctly represents the chemical relations related to iron and its compound?