This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Soil Structure – Atomic and Molecule Bonds”.
1. The nature of surface bonding force in soil is classified in to ___________ types.
Explanation: The nature of surface bonding is classified into three types as primary valence bond, hydrogen bond, secondary valence bond.
2. Atoms in one molecule bonding to atom in another molecule are called ____________
a) Primary valence bond
b) Secondary valence bond
c) Hydrogen bond
d) Electrostatic bond
Explanation: The bonding takes between two different molecules rather than the same hence it is called a secondary valence bond.
3. There are __________ types of primary valence bond.
Explanation: Covalent bond, heterpolar pond, ionic pond and co-ordinate bond are the five types of primary valence bond.
4. Which of the following bond is considered to be strongest?
a) Covalent bond
b) Heterpolar bond
c) Ionic bond
d) Co-ordinate bond
Explanation: The ionic bond occurs by exchange of electron in the union of ions which make it stronger.
5. The ionic bond, sometimes may be also called as ____________
a) Electrovalent bond
b) Covalent bond
c) Metallic bond
d) Heteropolar bond
Explanation: As there is an exchange of electrons between soil particles in an ionic pond, it is also called a ionic bond.
6. The hydrogen bond occurs when ____________
a) Atoms of hydrogen strongly attracted by two other atoms
b) Molecules of one atom bonding to atom of another
c) Atom of hydrogen is attracted by one atom
d) None of the mentioned
Explanation: When the atoms of hydrogen strongly attracted by two other atoms, hydrogen bond tends to occur.
7. The strength of hydrogen bond lies between the value of ____________
Explanation: The strength of hydrogen bond is between 5-10 Kcal per g-mole.
8. Intermolecular distance of bond in secondary valence bond is ____________
Explanation: Interatomic or intermolecular distance of secondary valence bond is >5 Å.
9. The secondary valence force caused by orientation effect is commonly known as ____________
a) Vander Waal’s force
b) Dispersion energy
c) Induced effect
Explanation: Vander Waal’s force is the common attractive force acting between all atoms and molecules of matter.
10. Flocculation is caused by increasing ___________
a) Electrolytic concentration
b) Ion valence
d) All of the mentioned
Explanation: The factor in a soil-water system affecting flocculation is electrolyte concentration, temperature and dielectric constant or ion valence.
Sanfoundry Global Education & Learning Series – Geotechnical Engineering.
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