Bond order bond length bond energy and metallic bonding - Question Bank

1. The strength of the metallic bond generally increases with:
A) Decreasing number of valence electrons
B) Increasing atomic size
C) Decreasing charge on the cation
D) Increasing charge density of cations and number of delocalized electrons
2. The bond length of O2 molecule is approximately:
A) 112 pm
B) 121 pm
C) 147 pm
D) 200 pm
3. Which of the following statements about bond order and stability is correct?
A) Higher bond order means lower stability.
B) Lower bond order means higher stability.
C) Higher bond order means higher stability.
D) Bond order does not affect stability.
4. What is the bond order of He2 molecule?
A) 0
B) 0.5
C) 1
D) 2
5. Metallic bonding is a type of:
A) Intermolecular force
B) Intramolecular force
C) Secondary bond
D) Weak chemical bond
6. Which of the following has the lowest bond energy?
A) N2
B) O2
C) F2
D) H2
7. The bond length of N2 molecule is approximately:
A) 109 pm
B) 121 pm
C) 147 pm
D) 200 pm
8. What is the bond order of CO+?
A) 2
B) 2.5
C) 3
D) 3.5
9. In metallic bonding, the cations are held together by:
A) Shared electron pairs
B) Electrostatic attraction to the electron sea
C) Hydrogen bonds
D) Dipole-dipole interactions
10. Bond energy is the energy required to:
A) Form a bond
B) Break a bond
C) Dissociate a molecule into atoms
D) Both (a) and (b)
11. Which diatomic molecule has a bond order of 2?
A) N2
B) O2
C) F2
D) H2
12. The concept of a 'sea of electrons' is used to describe:
A) Covalent bonding
B) Ionic bonding
C) Metallic bonding
D) Van der Waals forces
13. What is the bond order of O2+?
A) 1.5
B) 2.0
C) 2.5
D) 3.0
14. Which of the following has the shortest bond length?
A) F2
B) Cl2
C) Br2
D) I2
15. The metallic bond helps to explain why metals are typically:
A) Gases at room temperature
B) Poor conductors of heat
C) Solids at room temperature (except Mercury)
D) Insoluble in most solvents
16. As the number of bonds between two atoms increases, the bond length:
A) Increases
B) Decreases
C) Remains constant
D) Becomes zero
17. What is the bond order of CN- ion?
A) 1
B) 2
C) 3
D) 4
18. Which of the following is NOT a characteristic of metallic bonding?
A) High electrical conductivity
B) High thermal conductivity
C) Brittleness
D) Luster
19. The bond length of H2 molecule is approximately:
A) 74 pm
B) 94 pm
C) 110 pm
D) 139 pm
20. Which of the following has the highest bond order?
A) O2
B) O2+
C) O2-
D) O22-
21. In metallic bonding, the valence electrons are:
A) Shared between two specific atoms
B) Transferred from one atom to another
C) Free to move throughout the metallic lattice
D) Localized on individual atoms
22. If the bond order of a molecule increases, its bond energy:
A) Decreases
B) Increases
C) Remains unchanged
D) Becomes zero
23. What is the bond order of NO?
A) 1
B) 2
C) 2.5
D) 3
24. The metallic bond is considered a type of:
A) Covalent bond
B) Ionic bond
C) Intermolecular force
D) Intramolecular force
25. Which species has the longest bond length among the following?
A) N2
B) N2+
C) N2-
D) N22-
26. What is the bond order of O22- (peroxide ion)?
A) 1.0
B) 1.5
C) 2.0
D) 2.5
27. The property of malleability and ductility in metals is due to:
A) Strong ionic bonds
B) The ability of metal ions to slide past each other within the electron sea
C) The rigidity of the crystal lattice
D) The presence of localized covalent bonds
28. Which of the following diatomic species has a bond order of 0.5?
A) H2
B) He2
C) O2
D) N2
29. What is the bond order of Li2 molecule?
A) 0
B) 0.5
C) 1
D) 2
30. In metallic bonding, the positive metal ions are arranged in:
A) A linear chain
B) A regular lattice
C) A random cluster
D) A planar structure
31. Which statement about bond length and bond energy is correct?
A) Shorter bond length implies lower bond energy.
B) Longer bond length implies higher bond energy.
C) Shorter bond length implies higher bond energy.
D) Bond length and bond energy are unrelated.
32. The bond order of CO is:
A) 1
B) 2
C) 3
D) 4
33. Metallic bonding is strongest in metals that have:
A) Few valence electrons per atom
B) Many valence electrons per atom
C) Large atomic radii
D) Low ionization energies
34. What is the bond order of O2- (superoxide ion)?
A) 1.0
B) 1.5
C) 2.0
D) 2.5
35. Which of the following has the highest bond energy?
A) F2
B) Cl2
C) Br2
D) I2
36. The force that holds metal atoms together in a metallic solid is called:
A) Covalent bond
B) Ionic bond
C) Hydrogen bond
D) Metallic bond
37. As bond order decreases, bond energy generally:
A) Increases
B) Decreases
C) Remains constant
D) Becomes negative
38. What is the bond order of H2?
A) 0
B) 0.5
C) 1
D) 2
39. The delocalized electrons in metallic bonding are responsible for:
A) Brittleness
B) High melting points
C) Electrical conductivity
D) Low density
40. Which of the following has the shortest bond length?
A) N2
B) N2+
C) N2-
D) N22-
41. What is the bond order of O2+?
A) 1.5
B) 2.0
C) 2.5
D) 3.0
42. In a metallic lattice, the metal atoms exist as:
A) Neutral atoms
B) Anions
C) Cations
D) Diatomic molecules
43. The bond energy is directly proportional to the:
A) Bond length
B) Bond order
C) Number of lone pairs
D) Atomic radius
44. Which of the following diatomic molecules has a bond order of 1?
A) O2
B) N2
C) F2
D) He2
45. What is the bond order of the nitrogen molecule (N2)?
A) 1
B) 2
C) 3
D) 0
46. The metallic bond is characterized by the presence of:
A) Localized electron pairs
B) A sea of mobile electrons
C) Discrete covalent molecules
D) Strong dipole-dipole interactions
47. Which of the following species has the longest bond length?
A) H2
B) O2
C) N2
D) F2
48. What is the bond order of the oxygen molecule (O2)?
A) 1
B) 2
C) 3
D) 0
49. Which factor is primarily responsible for the strength of a metallic bond?
A) Ionic attraction between oppositely charged ions
B) Sharing of electrons between adjacent atoms
C) Electrostatic attraction between positive metal ions and delocalized electrons
D) Formation of covalent bonds between metal atoms
50. As the bond order of a bond increases, what happens to the bond length?
A) Increases
B) Decreases
C) Remains the same
D) Becomes zero
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