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Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - JEE MCQ


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25 Questions MCQ Test - Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT)

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Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 1

Only One Option Correct Type

This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct

Q.

Which represents the correct abundance order of elements in the earth crust?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 1

The mass-abundance of the nine most abundant elements in the Earth's crust is approximately: oxygen 46%, silicon 28%, aluminum 8.3%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium 2.0%, and titanium 0.61%.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 2

Which of the following contains both copper and iron?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 2

Chalcopyrite (CuFeS2) is the ore which contains both copper and iron.

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Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 3

Regarding cryolite incorrect statement is

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 3

Cryolite is an important ore of aluminum that is used in the extraction of aluminum from bauxite. It is a rare mineral that occurs in small quantities in Greenland, and its chemical formula is Na3AlF6.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 4

In chromite ore, the oxidation number iron and chromium are respectively ______.

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 4

In chromite ore is (FeO . Cr2O3)
Let the oxidation state of Fe be x.
∴ x - 2 + 2 x 3 + 3 x (-2) = 0
x - 2 + 6 - 6 = 0 ⇒ x = + 2
Let the oxidation state of Cr be y
∴ 2 y + 2 - 2 + 3 x (-2 ) = 0
2 y - 6 = 0
y = 3
Hence, oxidation state of Fe and Cr are +2 and +3 respectively.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 5

Sulphide ores are common for metals

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 5

Metals having high polarising power (Zeff) exist in ore with anions having high polarisibility
Ag, Cu, Pb →Sulphide ores (Ag2S, CuFeS2, Pbs)
Sn → Oxide ore (SnO2)
Mg→Sea water and dolomite (CaCO3, MgCO3)
Al →Oxide ore (Al2O3.2H2O)

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 6

Oxidation states of the metal in the minerals haematite and magnetite respectively are

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 6

Haematite is Fe2O3, in which oxidation number of iron is III. Magnetite is Fe3O4 which is infact a mixed oxide (FeO.Fe2O3), hence iron is present in both II and III oxidation state.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 7

Among the following statements the incorrect one is

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 7

Statement: Zinc blende and iron pyrites are sulphides. This statement is correct because zinc blende is ZnS and iron pyrites is FeS2.
Statement:Calamine and siderite are carbonates. This statement is correct because calamine is ZnCO3 and siderite is FeCO3
Statement: Malachite and azurite are ores of copper. This statement is also correct because malachite is Cu(OH)2.CuCO3 and azurite isCu(OH)2.2CuCO3
Statement: Argentite and cuprite are oxides. This statement is incorrect because argentite is Ag2S and cuprite is Cu2O.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 8

A mineral is called an ore if

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 8

A mineral is called an ore if a metal can be profiteably extracted from it. e.g. Aluminium occur in earth's crust in the form of two minerals i.e. bauxite (Al2O3 . 2H2O) and clay (Al2O3 . 2SiO2 . 2H2O). Out of these two minerals aluminium can be conveniently and economically extracted from bauxite while no easy and cheap method is so far available for the extraction of aluminium from clay. Therefore, the ore of aluminium is bauxite.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 9

Which is incorrect match?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 9

Siderite is a mineral composed of iron(II) carbonate (FeCO3)

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 10

The molecular formula of Glauber's salt is:

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 10

Glauber's salt, common name for sodium sulfate decahydrate, Na2SO4.10H2O. It occurs as white or colorless monoclinic crystals. Upon exposure to fairly dry air, it effloresces, forming powdery anhydrous sodium sulfate.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 11

One or More than One Options Correct Type

This section contains 5 multiple type questions. Each question has 4 choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q. Which of the following is the correct combination?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 11

Sodium nitrate is the chemical compound with the formula NaNO3. This alkali metal nitrate salt is also known as Chile saltpeter (large deposits of which were historically mined in Chile) to distinguish it from ordinary saltpeter, potassium nitrate. The mineral form is also known as nitratine, nitratite or soda niter.

*Multiple options can be correct
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 12

Which of the following is the correct combination?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 12

Calamine (ZnCO3), Siderite (FeCO3), Malachite (CuCO3 . Cu(OH)2), Calcite (CaCO3), Azurite (2CuCO3 . Cu(OH)2), Witherite (BaCO3).  MAGNESITE IS MgCO3 and DOLOMITE is CaCO3.MgCO3.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 13

Which is not the name of a mineral?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 13

Plaster of Paris is not a mineral. It is a building material made by heating gypsum, a mineral, to remove its water content. The other three options (Gypsum, Litharge, and Galena) are indeed minerals.

*Multiple options can be correct
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 14

Which of the following is a halide ore?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 14

Feldspar = KAISi3O8, Cryolite (3NaF.AlF3 or Na3AlF6).
Sylvine= KCI, Carnallite = KCI.MgCI2 . 6H2O

*Multiple options can be correct
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 15

Which is not an example of ore?

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 15

Ruby silver = Pyrargyrite(3Ag2S.Sb2S3 or Ag3SbS3),
Horn silver = AgCI
German silver = An alloy of Cu + Zn + Ni and Quick silver = Mercury.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 16

Comprehension Type

This section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)
                                                                           Passage

The natural substances in which metals occur in the earth are called minerals. A mineral has a definite composition. It may be a single compound or a complex mixture . It is usually associated with number of impurities. The minerals from which the metals can be conveniently extracted are called ores .Thus, all ores are minerals but all minerals are not ores. Depending on the composition ores are classified into different types such as oxides, sulphides, carbonates, halides, silicates etc.

Q. The impurities associated with minerals are called.

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 16

The correct answer is option A
The impurities associated with minerals used in metallurgy are collectively called Gangue.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 17

The natural substances in which metals occur in the earth are called minerals. A mineral has a definite composition. It may be a single compound or a complex mixture . It is usually associated with number of impurities. The minerals from which the metals can be conveniently extracted are called ores .Thus, all ores are minerals but all minerals are not ores. Depending on the composition ores are classified into different types such as oxides, sulphides, carbonates, halides, silicates etc.

Q. 

Metals that exist in their native state are

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 17

Elements which are not attached by moisture, oxygen and carbon dioxide of the air occur in the native state, e.g. Au, Pt, and noble gases.

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 18

Matching List Type

Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

Q.

Match the Column I with Column II and mark the correct options from the codes given below

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 18

(i) → (t), (ii) → (s), (iii) → (q), (iv) → (p)

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 19

 Match the Column I with Column II and mark the correct option from the codes given below.

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 19

(i) → (r), (ii) → (s), (iii) → (p), (iv) → (q,t)

*Answer can only contain numeric values
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 20

One Integer Value Correct Type

This section contains 5 questions, when worked out will result in an integer value from 0 to 9 (both inclusive)

Q. The number of carbonate minerals among the following

Cassiterite , Siderite , Anglesite , Azurite , Calamine , Cryolite ,Calcite ,Magnetite, Magnesite  


Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 20

The carbonate ores are siderite, azurite. calamine, calcite, magnesite.

*Answer can only contain numeric values
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 21

The different number of non-metals present in fluorapatite are


Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 21

Fluorapatite is 3Ca3(PO4)2 . CaF2 or Ca9(PO4)6CaF2.

*Answer can only contain numeric values
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 22

Number of oxide ores among Galena, Pyrolusite, Rutile, Cinnabar, Cassiterite, Haematite, Sphalerite, Salt petre, Cuprite


Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 22

The oxide ores are pyrolusite, rutile, cassiterite, haematite and cuprite.

*Answer can only contain numeric values
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 23

How many of the given mineral contain silicon in them? Pyrargyrite (Ruby silver), Kaolinite (China clay) .Feldspar, Willemite, Limonite, Mica, Beryl


Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 23

Silicon is present in Beryl = 3 BeO .  AI2O3 . 6SiO2;
Mica = K2O . 3AI2O3 . 6SiO2 . 2H2
Zn2SiO4 = Willemite; Feldspar = KAISi3O8.
China clay = Al2O3 . 2SiO2 . 2H2O (or) [AI2(OH)4 Si2O5]
Silicon is not present in
Limonite = 2Fe2O3 . 3H2O; Pyrargyrite (Ruby silver)
= 3Ag2S3Sb2S3.

*Answer can only contain numeric values
Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 24

Number of ores that have more than one metal or non-metal among: Horn silver, Quick silver, Chromite, Limonite, Cinnabar, Cryolite, Caliche, Diaspore, Fluorspar


Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 24

Chromite (Fe2CrO4), Limonite (Fe2O3 . 3H2O), Cryolite
(Na3AIF6), Caliche (NalO3), Diaspora (Al2O3 . H2O).

Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 25

Statement Type

This section is based on Statement I and Statement II. Select the correct anser from the codes given below.

Q. 

Statement I : The copper pyrite (CuFeS2) is the ore of copper.

Statement II : The clay (Al2O3 . 2SiO2 . 2H2O) is the ore of aluminium.

Detailed Solution for Test: Introduction to Metallurgy & Ores of Some Metals (Old NCERT) - Question 25

Aluminium cannot be extracted from clay profitably.

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