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In the thermite process … is used as a reducing agent.

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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)>Reduction of Metal Oxides to Metals

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

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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?

HARD

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

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

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}

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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.

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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?

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

In the context of the Hall-Heroult process for the extraction of

Al

, which of the following statements is false?

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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?

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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

MEDIUM

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

The correct statement

(s)

related to the metal extraction processes is(are)

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:

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

What is the role of silica in the metallurgy of copper?

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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 :-

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

Which one is the ore of copper?

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

In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of:

HARD

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

Extraction of copper from copper pyrite

(C u F e S_{2})

involves

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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:

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

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

$c)$ $PbS + 2 PbO ⟶ 3 Pb + {SO}_{2}$

$d)$ ${Cu}_{2} O + C ⟶ 2 Cu + CO$

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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.

HARD

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

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

In the thermite process … is used as a reducing agent.

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

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