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Test: Extraction of Metals - JEE MCQ


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15 Questions MCQ Test - Test: Extraction of Metals

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Test: Extraction of Metals - Question 1

The impurities associated with mineral used in metallurgy are called collectively?

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Impurities associated with minerals are called gangue or matrix.

Test: Extraction of Metals - Question 2

Which of the ore dressing process requires finest size of ore?

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The ore is crushed into a fine powder and mixed with water to form suspension.

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Test: Extraction of Metals - Question 3

Galena is an ore of

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Galena is an ore of lead. It is .

Test: Extraction of Metals - Question 4

Aluminothermic process is used for the extraction of metals, whose oxides are

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When reduction by carbon is not satisfactory in case of metals having high m.pt., aluminothermic process is used.

Test: Extraction of Metals - Question 5

Which one of the following is a mineral of iron ?

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Magnetite
Malachite
Cassiterite
Pyrolusite

Test: Extraction of Metals - Question 6

Calamine, bauxite, malachite and siderite respectively are ores of .........

Detailed Solution for Test: Extraction of Metals - Question 6

Calamine ZnCO3 is the ore of Zn. Bauxite, AlOx(OH)3−2x is the ore of Al. (where, 0 < x < 1)
Malachite, CuCO3⋅Cu(OH)2 is the ore of Cu. Siderite, FeCO3 is the ore of Fe.

Test: Extraction of Metals - Question 7

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

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Pig iron or cast iron contains carbon and varying amounts of and which makes the iron hard and brittle.

Test: Extraction of Metals - Question 8

Which of the following statement(s) is/are correct?
(i) Cast iron is used in the manufacture of railway sleepers
(ii) Wrought iron is used in the manufacture of anchors, bolts, chains etc.
(iii) Nickel steel is used in making pendulums.

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All three statements are correct

Test: Extraction of Metals - Question 9

Which one of the following is the mineral for tin?

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Thus, cassiterite (tin stone) is a mineral for tin.

Test: Extraction of Metals - Question 10

Pyrolusite is a/an

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is pyrolusite (oxide ore).

Test: Extraction of Metals - Question 11

Identify the correct set of sulphide ores from the following

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Sphalerite is a zinc sulfide mineral with a chemical composition of and . It is found in metamorphic, igneous, and sedimentary rocks.
Fool's Gold is a mineral pyrite or iron pyrite. It is an iron sulfide with the chemical formula .
Chalcopyrite is a copper iron sulfide mineral. It has the chemical formula .

Test: Extraction of Metals - Question 12

During smelting an additional substance is added which combines with impurities to form a fusible product. It is known as

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Flux is added which combines with impurities to form slag.

Test: Extraction of Metals - Question 13


, Ore of would be

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: Cinnabar

Test: Extraction of Metals - Question 14

Which one of the following oxides is reduced by water gas to obtain the metal during its extraction?

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Nickel oxide is reduced by water gas to obtain the metal. Other oxides are reduced by other reducing agent.

Test: Extraction of Metals - Question 15

The pair of oxides, which can be leached out, when powdered bauxite containing certain impurities is digested with concentrated solution of at temperature and bar pressure are

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Bauxite is the most important ore of aluminium contains only , the rest being a mixture of and . The powdered bauxite is treated with concentrated solution of resulting in the dissolution of and while the other oxides and ) being basic remain insoluble in . Hence, only and leached out.

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