Most Missed 2011
Bonding Exam
1. A solid substance was tested in the laboratory. The test
results are listed below.
• dissolves in water
• is an electrolyte
• melts at a high temperature
Based on these results, the solid substance could be
1) Cu
2) CuBr2
3) C
4) C6H12O6
2. Which compound has hydrogen bonding between its
molecules?
1) CH4
2) CaH2
3) KH
4) NH3
3. Which characteristic is a property of molecular substances?
1) good heat conductivity
2) good electrical conductivity
3) low melting point
4) high melting point
4. Given the balanced equation representing a reaction:
Cl2(g)  Cl(g) + Cl(g)
What occurs during this change?
1) Energy is absorbed and a bond is broken.
2) Energy is absorbed and a bond is formed.
3) Energy is released and a bond is broken.
4) Energy is released and a bond is formed.
5. A substance that does not conduct electricity as a solid but
does conduct electricity when melted is most likely
classified as
1) an ionic compound
3) a metal
2) a molecular compound 4) a nonmetal
6. Which formula represents a nonpolar molecule containing
polar covalent bonds?
1) H2O
2) CCl4
3) NH3
4) H2
7. Which molecule contains a nonpolar covalent bond?
1)
3)
2)
4)
8. At STP, fluorine is a gas and bromine is a liquid because,
compared to fluorine, bromine has
1) stronger covalent bonds
2) stronger intermolecular forces
3) weaker covalent bonds
4) weaker intermolecular forces
9. A solid substance is an excellent conductor of electricity.
The chemical bonds in this substance are most likely
1) ionic, because the valence electrons are shared between
atoms
2) ionic, because the valence electrons are mobile
3) metallic, because the valence electrons are stationary
4) metallic, because the valence electrons are mobile
10. What occurs when an atom of chlorine and an atom of
hydrogen become a molecule of hydrogen chloride?
1) A chemical bond is broken and energy is released.
2) A chemical bond is broken and energy is absorbed.
3) A chemical bond is formed and energy is released.
4) A chemical bond is formed and energy is absorbed.
11. Which symbol represents a particle that has the same total
number of electrons as S2–?
1) O2–
3) Se2–
2) Si
4) Ar
12. Based on electronegativity values, which type of elements
tends to have the greatest attraction for electrons in a bond?
1) metals
3) nonmetals
2) metalloids
4) noble gases
Most Missed 2011
Answer Key
[New Exam]
1.
2
2.
4
3.
3
4.
1
5.
1
6.
2
7.
3
8.
2
9.
4
10.
3
11.
4
12.
3