Chem Study Test
Test #2 ANSWERS
CHM 101
Part I Multiple Choice (2 points each)
1. Which element is most likely to form three covalent bonds?
A) C
B) Si
C) P
D) S
E) Se
2. A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________.
A) double; covalent
B) double; ionic
C) single; covalent
D) single; ionic
E) triple; covalent
3. Which property could describe a covalent compound?
A) It conducts electricity when melted.
B) Has a low boiling point
C) It is composed of a non-metal and a metal.
D) It conducts electricity when dissolved in water.
E) none of the above
4. In a Lewis dot structure the electrons which complete an octet but are not located between two atoms are referred to as
A) bonding pairs.
B) delta minus electrons.
C) excess electrons.
D) filled shells.
E) lone pairs.
5. In forming covalent bonds where the octet rule is obeyed, sulfur usually forms ________ bonds and chlorine usually forms ________ bonds.
A) one; one
B) two; two
C) one; two
D) two; one
E) six; seven
6. The number of valence electrons in the acetic acid molecule (CH3CO2H) is ________.
A) 0
B) 8
C) 16
D) 24
E) 32
7. A molecule in which the central atom forms three single bonds and has one lone pair is said to have a ________ shape.
A) bent
B) linear
C) planar
D) pyramidal
E) tetrahedral
8. A bond where the electrons are shared equally is called a(an) ________ bond.
A) polar covalent
B) coordinate covalent
C) nonpolar covalent
D) ionic
E) none of the above
9. In a precipitation reaction the insoluble product can be identified by the symbol ________.
A) (aq)
B) (l)
C) (g)
D) (s)
10. The scientific principle which is the basis for balancing chemical equations is
A) the Law of Conservation of Energy.
B) the Law of Conservation of Mass.
C) the Law of Conservation of Mass and Energy.
D) the Law of Definite Proportions.
E) Avogadro's Law.
11. The reaction 2 AgNO3
CHM 101
Part I Multiple Choice (2 points each)
1. Which element is most likely to form three covalent bonds?
A) C
B) Si
C) P
D) S
E) Se
2. A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________.
A) double; covalent
B) double; ionic
C) single; covalent
D) single; ionic
E) triple; covalent
3. Which property could describe a covalent compound?
A) It conducts electricity when melted.
B) Has a low boiling point
C) It is composed of a non-metal and a metal.
D) It conducts electricity when dissolved in water.
E) none of the above
4. In a Lewis dot structure the electrons which complete an octet but are not located between two atoms are referred to as
A) bonding pairs.
B) delta minus electrons.
C) excess electrons.
D) filled shells.
E) lone pairs.
5. In forming covalent bonds where the octet rule is obeyed, sulfur usually forms ________ bonds and chlorine usually forms ________ bonds.
A) one; one
B) two; two
C) one; two
D) two; one
E) six; seven
6. The number of valence electrons in the acetic acid molecule (CH3CO2H) is ________.
A) 0
B) 8
C) 16
D) 24
E) 32
7. A molecule in which the central atom forms three single bonds and has one lone pair is said to have a ________ shape.
A) bent
B) linear
C) planar
D) pyramidal
E) tetrahedral
8. A bond where the electrons are shared equally is called a(an) ________ bond.
A) polar covalent
B) coordinate covalent
C) nonpolar covalent
D) ionic
E) none of the above
9. In a precipitation reaction the insoluble product can be identified by the symbol ________.
A) (aq)
B) (l)
C) (g)
D) (s)
10. The scientific principle which is the basis for balancing chemical equations is
A) the Law of Conservation of Energy.
B) the Law of Conservation of Mass.
C) the Law of Conservation of Mass and Energy.
D) the Law of Definite Proportions.
E) Avogadro's Law.
11. The reaction 2 AgNO3