CHEMICAL BONDING QUIZ X Part III

1.Which substance contains nonpolar covalent bonds?
a. Cl2
b. Ca(OH)2
c. H2O
d. CaO
e. CCl4
2.Which type of substance is soft, has a low melting point, and is a poor conductor of heat and electricity?
a. network solid
b. metallic solid
c. molecular solid
d. ionic solid
3.Which substance contains coordinate bond?
a. NH4Cl
b. NH3
c. HCl
d. NaCl
e. H2O
4.The correct answer of the dot electrons with an arrow is ….
a. ionic bond
b. covalent bond
c. co-ordinate bond
d. lone pair electrons
e. bond pair electrons
5.Which molecule is nonpolar?
a. HF
b. CO2
c. H2O
d. NH3
e. H2S
6.Which bond has the highest degree of polarity?
a. HF
b. NO
c. H2O
d. H2
e. N2
7.Which of the following molecules is polar?
a. CO2
b. H2
c. H2S
e. BF3
e. CCl4
8.Molecular polarity can be determined by the ….
a. number of protons
b. number of electrons
c. distribution of charge
d. distribution of neutrons
e. number of pair electrons
9.Which characteristic is a property of molecular substances?
a. low boiling point
b. high melting point
c. good heat conductivity
d. good electrical conductivity
10.What is used to assess the degree of polarity in the bond?
a.the sum of electronegativity of the two bonded atoms
b.electronegativity difference of the two bonded atoms
c.the sum of ionization energy of the two bonded atoms
d.atomic radius difference of the two bonded atoms
e. length of radius of the two bonded atoms
11.Which of the following statements is (are) incorrect?
a. Nonmetals tend to react with other nonmetals to form molecular compounds.
b. Symmetrical molecules are nonpolar
c. The distribution of charge is unequal in an asymmetrical molecule.
d. H2 is a symmetrical molecule
e. CH4 is an asymmetrical molecule
12.Metallic bond is the bond occurs between ….
a.substances
b.metal and non metal
c.compounds
d.metal
e.metal in ionic compound
13.The correct statement about metallic bond is the bond between ….
a.cation and anion
b.anions and electrons’ current
c.negative ions of non metals and electrons’ current
d.positive ions of metals and electrons’ current
e.negative ions of metals and electrons’ current
14.Which statement describes a chemical property of iron?
a. Iron conducts electricity and heat
b. Iron can be drawn into a wire
c. Iron can be flattened into sheets
d. Iron combines with oxygen to form rust V
e. Iron can melt at room temperature
15.The effect of electrons’ current in metal is ….
a.electrons have a strong bond
b.protons link each other
c.electrons move freely
d.protons and electrons link strongly
e.electrons interact one of another
16.Metallic bonding occurs between atoms of ….
a. sulfur
b. fluorine
c. copper
d. carbon
e. hydrogen
17.Metallic bonding occurs between metal atoms that have ….
a. full valence orbitals and low ionization energies
b. full valence orbitals and high ionization energies
c. vacant valence orbitals and low ionization energies
d. vacant valence orbitals and high ionization energies
18.Which characteristic is a property of metallic substances?
a. low boiling point
b. low melting point
b. no conductivity because there are no free moving electrons/ions
c. not malleable because particles cannot slide pass one another
d. relatively low solubility
19.Which of the following Period 4 elements has the most metallic characteristics?
a. K
b. Ca
c. As
d. Ge
e. Br
20.Which of the following elements has the most metallic characteristics?
a. Ca
b. O
c. Na
d. Al
e. Br