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Describe pyrometallurgy.

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)>Reduction of Metal Oxides to Metals

The most common method, used for extraction of metals from oxide ores involves

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

During the extraction of copper, the impurity

(FeS)

is removed as slag by mixing the contaminated copper ore with silica and coke. The molecular formula of slag is

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Which of the following statements is correct during the extraction of copper?

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Calamine is an ore of:

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

What is flux? Give one example of each of an acidic flux and a basic flux.

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

The pair that does not require calcination is

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

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)>Reduction of Metal Oxides to Metals

Sulphide ores are common for the metals:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Which of the following metals cannot be obtained by auto-reduction of their compounds?

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Which among following processes occurs at

1500 K

in blast furnace for extraction of iron

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

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

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

The major products of the following reaction are

ZnS (s) + O_{2} (g) \overset{heat}{\to}

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

The addition of silica during the extraction of copper from its sulphide ore :-

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Which among the following is not a mineral of iron?

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Calamine, malachite, magnetite and cryolite, respectively are:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Name the most common ore of the metal aluminium from which the metal is extracted. Write the chemical formula of the ore.

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

Identify the auto reduction reactions from the following:

$a)$ ${Fe}_{3} O_{4} + 4 CO ⟶ 3 Fe + 4 {CO}_{2}$

$b)$ ${Cu}_{2} O + \frac{1}{2} {Cu}_{2} S ⟶ 3 Cu + \frac{1}{2} {SO}_{2}$

$c)$ $PbS + 2 PbO ⟶ 3 Pb + {SO}_{2}$

$d)$ ${Cu}_{2} O + C ⟶ 2 Cu + CO$

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Reduction of Metal Oxides to Metals

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)>Reduction of Metal Oxides to Metals

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

Describe pyrometallurgy.

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

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