Chem I Bonding Practice Quiz
1. A chemical bond between atoms results from the attraction between electrons and
a) protons
b) neutrons
c) isotopes
d) Lewis structures
2. A covalent bond consists of
a) a shared electron
b) a shared electron pair
c) two different ions
d) an octet of electrons
3. If two covalently bonded atoms are identical, the bond is identified as
a) nonpolar covalent
b) polar covalent
c) nonionic
d) dipolar
4. A covalent bond in which there is an unequal attraction for the shared electrons is
a) nonpolar
b) polar
c) ionic
d) dipolar
5. Bonds that possess between 5% and 50% ionic character are considered to be
a) ionic
b) pure covalent
c) polar covalent
d) nonpolar covalent
6. Which of the following intermolecular forces are the strongest?
a)
b) Hydrogen Bonding
c) dipole-dipole
d) ionic
7. To draw a Lewis structure, it is NOT necessary to know
a) which atoms are in the molecule
b) the total number of electrons in the molecule
c) the number of valence electrons for each atom
d) the number of atoms in the molecule
8. Multiple bonds may form in molecules that contain carbon, nitrogen, or
a) chlorine
b) hydrogen
c) oxygen
d) helium
9. An example of a molecule that cannot be represented adequately by a single Lewis structure is
a) O2
b) CO2
c) O3
d) N2
10. The electrons involved in the formation of a chemical bond are called
a) dipoles
b) s electrons
c) Lewis electrons
d) valence electrons
11. The chemical bond formed when two atoms share electrons is called a(n)
a) ionic bond
b) orbital bond
c) Lewis structure
d) covalent bond
12. The greater the electronegativity difference between two bonded atoms, the greater the percentage of
a) ionic character
b) covalent character
c) metallic character
d) electron sharing
13. Bonds that have more than 50% ionic character are considered
a) polyatomic
b) polar covalent
c) ionic
d) nonpolar covalent
14. The pair of elements that forms a bond with the least ionic character is
a) Na and Cl
b) H and Cl
c) O and Cl
d) Br and Cl
15. The B-F bond in BF3 is
a) polar covalent
b) ionic
c) nonpolar covalent
d) pure covalent
16. In which of these compounds is the bond between the atoms NOT a nonpolar covalent bond?
a) Cl2
b) H2
c) HCl
d) O2
17. In drawing a Lewis structure, each nonmetal atom except hydrogen should be surrounded by
a) 2 electrons
b) 4 electrons
c) 8 electrons
d) 10 electrons
18. The substance whose Lewis structure shows three covalent bonds is
a) H2O
b) CH2Cl2
c) NH3
d) CCl4
19. How many double bonds are in the Lewis structure for hydrogen fluoride, HF?
a) none
b) one
c) two
d) three
20. How many electrons must be
shown in the Lewis structure of the hydroxide ion,
a) 1
b) 8
c) 9
d) 10
21. Bonding in molecules or ions that cannot be correctly represented by a single Lewis structure is
a) covalent bonding
b) resonance
c) single bonding
d) double bonding
22. Compared with nonmetals, the number of valence electrons in metals is generally
a) smaller
b) greater
c) about the same
d) almost triple that of nonmetals
23. According to VSEPR theory, the repulsion between electron pairs surrounding an atom causes
a) an electron sea to form
b) positive ions to form
c) these pairs to be separated as far as possible
d) light to reflect
24. According to VSEPR theory, the structure of the ammonia molecule, NH3, is
a) linear
b) bent
c) trigonal pyramidal
d) tetrahedral
25. Use VSEPR theory to predict the shape of the HCl molecule.
a) tetrahedral
b) linear
c) bent
d) trigonal pyramid
26. Use VSEPR theory to predict the shape of the CF4 molecule.
a) tetrahedral
b) linear
c) bent
d) triangle
27. Use VSEPR theory to predict the shape of the ClO4- ion..
a) triangle
b) tetrahedral
c) trigonal pyramid
d) bent
28. Use VSEPR theory to predict the shape of the H2S molecule.
a) tetrahedral
b) linear
c) bent
d) triangle
29. Use VSEPR theory to predict the shape of the CO2 molecule.
a) tetrahedral
b) linear
c) bent
d) triangle
30. The strong forces of attraction between the positive and negative regions of molecules are called
a) dipole-dipole forces
b)
c) orbital forces
d) covalent bonding
31. The weak intermolecular forces resulting from instantaneous and induced dipoles are called
a)
b) dipole-dipole forces
c) hydrogen forces
d) polar covalent bonding
32. Compared with intramolecule bonds, the strength of intermolecular forces is
a) weaker
b) stronger
c) about the same
d) too variable to compare
33. The equal but opposite charges present in the two regions of a polar molecule create a(n)
a) electron sea
b) dipole
c) ionic bond
d) covalent bond
34. The boiling point of water, H2O, is higher than the boiling point of hydrogen sulfide, H2S. This can mostly be explained by
a)
b) covalent bonding
c) ionic bonding
d) hydrogen bonding
35. A polar molecule contains
a) ions
b) a region of positive charge and a region of negative charge
c) only
d) no bonds
36. Iodine monochloride, ICl, has a higher boiling point than Br2 mostly because iodine monochloride is a(n)
a) nonpolar molecule
b) ion
c) crystal
d) polar molecule
37. Of the following elements, which has the highest boiling point?
a) xenon
b) argon
c) neon
d) helium
38. Of the following molecules, which has the highest boiling point
a) NI3
b) Cl2
c) NH3
d) F2
39. Of the following molecules, which has the highest boiling point
a) H2O
b) H2
c) HCl
d) H2S
40. Of the following molecules, which has the highest boiling point
a) H2
b) O2
c) N2
d) He
41. To form a molecule with a triangle shape, the ratio of shared pairs of electrons to lone pairs on the central atom is
a) 2 : 2
b) 4 : 0
c) 3 : 0
d) 3 : 1
42. Which bond is the strongest between 2 atoms?
a) single bond
b) double bond
c) triple bond
d) all the same
43. Which of the following has ionic bonding?
a) CO
b) Na2O
c) CO2
d) CCl4
e) none
44. Which of the following molecules contains one or more polar covalent bonds?
a) KCl
b) BaO
c) H2S
d) K2O
e) BaCl2
45. The number of polar covalent bonds in CCl4 is
a) 1
b) 2
c) 3
d) 4
e) none
46. Water sticking to glass is an example of
a) cohesion
b) adhesion
c) surface tension
d) capillary action
47. Water rising up small tubes is an example of
a) cohesion
b) adhesion
c) surface tension
d) capillary action
48. Which of the following is responsible for surface tension?
a) cohesion
b) adhesion
c) hydrogen bonding
d) capillary action
e) a and c
----------Key----------
1. (a)
2. (b)
3. (a)
4. (b)
5. (c)
6. (d)
7. (b)
8. (c)
9. (c)
10. (d)
11. (d)
12. (a)
13. (c)
14. (d)
15. (b)
16. (c)
17. (c)
18. (c)
19. (a)
20. (b)
21. (b)
22. (a)
23. (c)
24. (c)
25. (b)
26. (a)
27. (b)
28. (c)
29. (b)
30. (a)
31. (a)
32. (a)
33. (b)
34. (d)
35. (b)
36. (d)
37. (a)
38. (c)
39. (a)
40. (b)
41. (c)
42. (c)
43. (b)
44. (c)
45. (d)
46. (b)
47. (d)
48. (e)