Structures in Clay Minerals – MCQ

Structures in Clay Minerals – MCQ

1. The clayey soil is formed by the chemical weathering of

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Clay Minerals

How Are Cast Fossils Formed?
How Are Cast Fossils Formed?

2. The kaolinite mineral is formed by the breakdown of

a) Feldspar
b) Chlorite
c) Amorphous
d) None of these

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a) Feldspar

3. Which of the following statement is true

a) Clay mineral is the colloidal size (<0.002 mm)
b) Clay mineral having a high specific surface
c) Clay minerals are of the flaky form
d) All of these

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d) All of these

4. What is the chemical composition of kaolinite?

a) Al4Si4 O10(OH)8 .4H2O
b) Al4Si8 O20(OH)8 .nH2O
c) Al4Si4O10(OH)8
d) Al2Si4O10(OH)2

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c) Al4Si4O10(OH)8

5. What is the chemical composition of Illite?

a) KAl4 AlSi7 O20(OH)4
b) Al4Si8 O20(OH)8 .nH2O
c) Al4Si4 O10(OH)8 .4H2O
d) Al2Si4O10(OH)2

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a) KAl4 AlSi7 O20(OH)4

6. Most of the clay minerals consist of a

a) Silica tetrahedron
b) Silica octahedron
c) Alumina tetrahedron
d) None of these

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a) Silica tetrahedron

7. The reaction by which silicon and aluminium are partially replaced by other elements is known as.

a) Isomorphous substitution
b) Isomorphic substitution
c) Isotropic Interchange
d) None

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a) Isomorphous substitution

8. A tetrahedron has __ numbers of faces.

a) 2
b) 4
c) 6
d) 8

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b) 4

9. In case of kaolinite, clay mineral particle., The thickness of each stack of silica and alumina is about.

a) 3 A0
b) 5 A0
c) 7 A0
d) 9 A0

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c) 7 A0

10. The hydrogen bond of kaolinite clay minerals is —– than the potassium bond of illite clay minerals.

a) Stronger
b) Weaker

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a) Stronger