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

MEDIUM

Earn 100

The main function of roasting is

50% studentsanswered this correctly

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

EASY

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:

EASY

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

What is calcination?

EASY

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.

EASY

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.

EASY

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

Explain calcination and roasting with examples.

HARD

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

Differentiate between 'Roasting' and 'Calcination'

EASY

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

Which of the following reduction reaction CANNOT be carried out with coke?

EASY

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:

EASY

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?

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?

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?

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

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.

EASY

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

Among the reactions

(a) - (d),

the reaction(s) that does/do not occur in the blast furnace during the extraction of iron is/are:

(a)

C a O + S i O_{2} \to C a S i O_{3}

(b)

3 F e_{2} O_{3} + C O \to 2 F e_{3} O_{4} + C O_{2}

(c)

F e O + S i O_{2} \to F e S i O_{3}

(d)

F e O \to F e + \frac{1}{2} O_{2}

EASY

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

Match items of column-I with the items of column-II and assign the correct code:

	Column I		Column II
$(a)$	Cyanide process	$(i)$	Ultrapure $Ge$
$(b)$	Froth floatation process	$(ii)$	Dressing of $ZnS$
$(c)$	Electrolytic reduction	$(iii)$	Extraction of $Al$
$(d)$	Zone refining	$(iv)$	Extraction of $Au$
		$(v)$	Purification of $Ni$